The wiring diagram link is here;
http://milleniatech.net/docs/
You can download it for free, just gotta jump through a couple hoops.
It's so fun because all the Millenia's were automatic. Ugh. But we wired up the tranny plug so it's always in PARK. And ran the power from the fuse block to the injectors. We've got the starter and alternator running through the Protege fuse block through the Protege multi-pin white clip that connects to the block.
Where would be a good spot to ground the negative battery terminal? There are two think wires coming from it. I grounded on in the stock location on the strut tower. And the second I was thinking to a 12mm bolt hole open on the block near the coolant lines. Then ground the Protege harness and Milly harness to the block.
I'm soooo close. I'm thinking about flying Justin and Cres out to Ohio for the weekend to help us wire this b**** up. heh-heh