I wired my remote into the Spyder. Here are the pics.

Door opener 1.jpgDoor opener 2.jpg

I found a switch on Ebay I think. I was looking for a unlit or amber single pole, double throw, momentary both ways, Carling style rocker switch. The best I could do had blue light and double pole. But still works.
Soldered wires to the circuit board in the remote. Then connected to the switch
Since these picture where taken. I have moved the remote reward of the switch from in front.

You should be able to do similar on your RT.