How do I connect the remote wire from my amp in my car to my head unit?

Basically, I have got power to my amp, connections from my amp to my sub and connections from my amp to my after market head unit. Amp and sub is the brand kicker and the head unit is jvc. I need to know what wire I connect the blue remote wire to in the back of the head unit from the amp... Any helpful info would be wonderful... :)