I partially did this modification. I hardwired a 9500ix with a black phone cord. I'm not using a blendmount. On an FX50 2010, the wires on the rearview mirror are Black, Gray, and Brown (aka. red/pink). Black is return or ground, Brown is 12v power I believe. With an invisicord, it goes Black to Black, Yellow to Brown. With the green and red wires in a RJ11 phone cord, it goes Green to Black, Red to Brown. This all matters in DC. I tried just adding solder to the wires, but phone lines are 24 gauge, tiny weak wires, and they didn't hold well. I added some pins, which you can find in scrap computer equipment, old cables, possibly speaker interconnects, or an electronic components or possibly hardware store. They insert by friction fit. If you go with the phone cord trick, I'd suggest trying to find 22 gauge phone wires. I had some trouble since taping the wires kept undoing that friction fit, so I skipped the tape. Probably needs longer pins -- no idea what Invisicord uses. Anyway, it's working, looks great.