I think that some information is required. Which Arduino board? A data sheet for the ESC. A schematic of the setup.
It will be easier to help you if you will read and follow the forum guidelines.
Sorry, I don't know anything about that ESC. My post was an effort to get the information that others would need in order to help you.
If one pin is 5V then Enable is active High. If one pin is GND, then Enable is active LOW.(the latter is probably more likely).
I would also disconnect power and check continuity of both remote wiresto the ESC servo cable red and black wires to see if one of the remote wires goes to GND or 5V.
Next using a multi-meter set to measure current place the meter leads across the switch wires, we really need to know what the switch is switching.
Try disconnect the battery and checking continuity from both of the remote wires to the male deans batteryconnector terminals.