Will i have left over wires when i connect the wiring harness to the radio harness?

I'm installing my radio for the first time so i can say i did it, but i think i got everything down just one question. I'm not sure on connecting the wiring harness to the radio harness. (for an Isuzu Rodeo '98) I know its color coded and theres a wire guide on the back of the radio but i seem to have left over wires? The harness is 70-7712. I haven't started because i wanted to make sure, so any advice is nice :) Thanks in advance