Thank you to all the replies. Regarding the GPS antenna, Im planning on selling my Avic-D1 and was gonna just add the f90bt antenna to the d1, that way I wouldn't have to remove the antenna. I most certainly don't wanna cut it either.
So basically: I need to disconnect the D1 harness and color match with the F90BT harness.
And on top of that I can either A) re-route the GPS antenna and put the F90 antenna in or I can just cut of the end of the connector of the D1 and attach the F90, but that would be bad since I am selling the D1.
Is all this correct, or did I miss something?