So, I am shopping for a small trailer to tow, but my jeep will not arrive wired correctly. It will have a 4 plug trailer wire, for basic lights , like tail/brake/turn signals, that's it. But I want to addthe wiring to power my trailer so that it charges the onboard batteries while I drive to. Is this complex to do, and best left to a specialty shop? Or can I tackle it myself? I do want to learn more and do some stuff myself. But not mess it up either.