I was hoping Mike (foxfab) would post up.
I prefer having separate switches, with lights for locked and unlocked:
I also wired my own relay box, mine lives under the shelf in the back of my Xcab:
The ECU that they put in the Taco/4Runner will only run one locker. You can also get one for the FZJ80, it will run both. But, those things are unobtanium in the junkyards, and a new one from Toyota is mucho $$$, like around $300 last I knew. Not worth it.