I'm looking at the assembly manual trying to figure out how to route the brown wire that runs from the top mounted battery terminal to the junction box. Right now looking down onto the battery, positive is on the right and the brown wire comes out of the left and goes under the cable around the bottom (front side) of the battery. I don't think that makes sense.
Ed
This is how I ran the one on my 69 Z, just make sure you do not set the battery on the wire and pinch it. FWIW originally the positive battery post on a Y55 was closest to the fender with the neg closer to the engine.
(https://lh3.googleusercontent.com/pw/ACtC-3e0PAhRpf8f4Znk70M-8sxcQmjE6ZwgkqXU2YeGC36C8jT2uu81S67DCBnUH27aoGTAEMrf7JZdeq39rL7p4n0EDqoGpHn7Sxj2yBq3dU_OSHJoEQGWVxqEX6-13MwpWoFrcu9BUUKpF2xJCE9dS51cZQ=w1179-h884-no?authuser=0)