OK, my dashboard is stripped out, but I can't find a usable pathway to route the GPS antenna cable through the firewall. There is a rubber **** in the top middle, but that opens out to the back of the HVAC box and I cant access it from inside the dash.
There is another rubber **** with wires beneath the brake booster, but when I poke a wire coat hanger through it, it doesn't go through into the cabin, seems there is a L shaped turn with another **** on the inside that I can't route through. How did you do it?
My unit also appears to have a different OS that does not run Android apps. It seems to be a Windows CE unit? I bought it from the link you provided to Naviplus.