Hello.
In another post (
https://hiace-super-custom.forumotion.com/t4051-2l-3l-engine-repair-manual-pub-no-rm123e) I described some of the resources I have and rather than add them there (as the title of that post wasn't very accurate), I've created this message to post some of them here. They will be links and files, too.
This is useful and as far as I can tell clean (no promises, though): https://www.allcarmanuals.com/factory-service-manual-143-Toyota-HiAce-H100.html
For example something I've just found is here: https://www.hiacesoutheast.com/hiace-manuals, which includes a fab set of documents. The electrical info is the same as above but all joined together.
One document I got from my van's previous owner is a diagram of the CC's domestic wiring. It's here:
Will add more as I find them!
Cheers