2jz wiring harnees questions and oem plugs

So im planning on making a completely new engine harness for my 2jzgte supra mk4 and ive got a few questions.

1. Can i completely remove the diagnostics connector from the engine bay? I really see no need for it since im running a linkg4+

2. Can i completely remove the factory throttle control ecu (traction control) from the loom? I have removed the trac butterly and relays so i cant really see a need for it to be there. And from what i can work out from the factory wiring diagrams i can remove it

3. Does anyone have a good website in australia for oem connectors besides efihardware.com.au or going outside of aus? I can find alot of websites from the usa but id much rather buy locally and efihardware seems a tad expensive

For supplies. https://www.motorsportelectrics.com.au/

They seem to have reasonable prices.