Contact M & H Electric -
http://www.wiringharness.com Customer Service 562-926-9552. I contacted them and spoke with one of their specialists concerning battery cables for my 65 Dart. They have the schematics for Chrysler battery cables going back to at least 65 and probably later. I ordered one and it was exactly like my original. Ulf - 65dartcharger - also ordered a set of pos and neg cables for his 65 Dart and they were exactly like OEM. With a new engine/light harness, you may want to finish the job with a correct battery cable set.
The engine/light harnesses Year One sells - guess who makes them for YO? Yep M & H Electric! M & H will make you battery cables but not the other harness sets since YO has the exclusive rights to them.