MKR RS485 SHIELD with MKR ZERO

Hello everybody,
I'm new on this Forum and I've just started to "play" with Arduino.
I decided to use a MKR ZERO board connected to a MKR RS485 Shield in order to make a very simple RS485 byte transmitter.
Sincerely, I've not found on internet many info about MKR ZERO pinout or examples.
However my question is: how can I convert the MKR ZERO UART to RS485 on MKR RS485 shield?
I'm right if I use MKR ZERO default pins #14 and #13?
Again: into the IDE code, is right to use the Serial1 as into following code example?

Scope of the program is explained into introduction.

/*
  First: By pressing Connection button sends on Rs485 a 3 bytes sequence until the remote device doesn't answer the same sequence.
  When the remote device answers, the first received byte is the device address.
  I use the device address to form the Reset sequence.
  By pressing Reset button sends a 3 bytes reset sequence.
*/

// =================  Constants:
const int PinConnectButton = 5;         // Connection starting sequence Button
const int PinResetButton = 4;           // Reset command Button
const long TxDelayTime = 1000;          // Transmission delay time

// ================= Variables:
int ConnectButtonState = 0;             // Connection button state
int ResetButtonState = 0;               // Reset button state
byte Address = 0x00;                    // remote device address
bool Connected = false;                 // connection state
int NumByteRx = 0;                      // read bytes number

// ================= Arrays:
byte Tx_Message[3];                     // transmission buffer
byte Rx_Message[3];                     // receiving buffer


void setup() {
  pinMode(PinConnectButton, INPUT_PULLUP);
  pinMode(PinResetButton, INPUT_PULLUP);
  // Serial1 at 9600 baud (default pins 14-TX e 13-RX)
  Serial1.begin(9600);
  Serial1.setTimeout(1000);
}


void loop() {
  // Read "PinConnectButton" state:
  ConnectButtonState = digitalRead(PinConnectButton);
  // Check if button is pressed:
  if (ConnectButtonState == LOW) {
          // Reset Address:
          Address = 0x00;
          // Interrogation sequence and waiting for response
          for (byte i = 0x01; i <= 0x18; i++) {
              // Preparing message to send:
              Tx_Message[0] = {i};
              Tx_Message[1] = {0x10};
              Tx_Message[2] = {Tx_Message[0] ^ Tx_Message[1]};
              // Send message:
              Serial1.write(Tx_Message, sizeof(Tx_Message));
              // Listening to response:
              while (Serial1.available()>0){
                    NumByteRx = Serial1.readBytes(Rx_Message, 3);
                    if ((Rx_Message[0] == Tx_Message[0]) && (Rx_Message[1] == Tx_Message[1]) && (Rx_Message[2] == Tx_Message[2])){
                        Address = Rx_Message[0];
                        Connected = true;
                        break;
                    }
                    else{
                        Connected = false;
                    }
              } 
              // Delay before next send
              delay(TxDelayTime);
           }

  // Read "PinResetButton" state:
  ResetButtonState = digitalRead(PinResetButton);
  // Check if button is pressed and goes on only if it's connected:
  if ((ResetButtonState == LOW) && (Connected == true)) {
         // Preparing Reset message to send:
        Tx_Message[0] = {Address};
        Tx_Message[1] = {0x11};
        Tx_Message[2] = {Tx_Message[0] ^ Tx_Message[1]};     
        // Send Reset message:
        Serial1.write(Tx_Message, sizeof(Tx_Message));
        delay(500);
  }
}

Thank you in advance.