i have this, I cut 2 and 7 on radio side of harness
tapped the OW, VW from radio to wheel side
I need to add a 3rd wire to 6?
no 6 on wheel side-blank
Just add a wire to slot 6 and cut 2 and 7 and splice into the radio.
As for a mod, I rank this right next to my folding backseat conversion as number 1 mod.