I am adding FoST ST3 Recaro's to my base FiST. I am hoping to retain the heat function on the seats so I ordered the factory FiST buttons in hopes to use those vs. some ugly aftermarket ones. But does anyone have a wiring diagram? I have basic wiring and electrical skill but am hoping to get a guide to get started. I hunted for a part number for the harness but doesnt look like you can simply add the heated seat harness from what I can see.