I have a Genie Pro 88 garage door opener (old, but new to me). This opener has a 5 wire terminal block and I'm not sure what connects to each one. I have my push button switch connected to #1 and #2, and the door opens and closes correctly. The other 3 terminals are my area of confusion. I have a Genie Radio receiver (GR-85) that has 3 wires which are white, black, and red. Does anyone know which of the 3 remaining terminals they connect too?

Thanks in advance.

KC