I've put a 7MGTE into the Cressida and the only thing left to do is the wiring. I can't wrap my head around it so I'm going to get someone else to do it.

I'm using the trans that came with the Cressida as the engine package was manual. The MX83 trans has 3 plugs and the 7MGTE loom has 5.

If I use the 7MGTE auto ECU, will this affect it at all?