how to pair HC-05 using Arduino MEGA 2560

I am having difficulty figuring out the pin placement for the HC-05 Bluetooth Module while trying to configure it (AT Mode) using the Arduino MEGA 2560. I have a couple of them understood (I believe anyway) but not all.

HC-05 Arduino MEGA

EN/KEY ---->
VCC ----> 5v
GND ----> GND
TX ----> TX1
RX ----> RX1
STATE ---->

I am trying to configure a Master and Slave as I will be plugging them into their own Arduino MEGA for a project. Any assistance will be greatly appreciated.