The more earth straps the better I guess. If it was there from the factory I assume it should be re-connected if it's already hanging off the box. It's not going to drain my life (like driving an AE82 every day) to connect one wire, haha.

Turns out the reason it was not starting was my fault for not connecting the small wire to the correct terminal. I had it on the terminal closer to the engine instead of the other one closer to the strut. No dramas, all good now, starts and runs sweet. Looking forward to taking it out for a run during the week if I get time. Gotta re-fit a couple more little things.

Anyone want to buy a nice AE82? My old daily is up for cheap arse sale with rego to December.