I have the same winch and a similar problem. I have mounted this on a home made freight elevator. I am a controls technician. I want to install relays and top and bottom switches and an rf relay for remote control, but why they have the up and down buttons with three switches and three capacitors leads me to believe the switches in the pendant are doing more than one function. It is not as simple as having either switch give power from one wire to another. My answer to your problem is take the switches out of the pendant you want to add and replace them with the original switches and wiring. You might have to add a face plate for mounting or maybe you can modify the holes you have.