I'm installing an aftermarket radio in my '08 fit. The factory radio had 2 connections, but my aftermarket harness Scosche HA10B, only has one connection. Is the second factory connector just not used for aftermarket stereos?

Thanks

 

I am positive that when I installed my head unit that I only used one of those two connections. If I remember correctly it was the one on the left.

You could always plug your adapter in and hook it up to the new unit then turn it on without actually mounting it in the dash, just to make sure you dont have to take it out again.