Hi all, im a bit new to this so bare with me and be gentle.. here goes

Im in the middle of fitting electric windows to my T5 transporter which were kindly donated from a mk4 golf, so far ive managed to get each window working independently from two separate switches (one each door) but im pulling my hair out trying to fit a third switch to the drivers door to operate the passengers window, don't get me wrong im no idot but seam to be having one hell of a blonde moment and cant figure the wiring for the life of me. Heres a run down of what ive done so far...

Two relays one for up one for down

terminals 30 live out to motor for up and same on the other relay for down