99 tacoma 2.4 need help with Junction block 3 pin diagram

So I'm very green at troubleshooting electrical issues, I've spent hours going over detailed instructions on how to read automotive wiring diagrams to the point where I'm confident that with enough time I can tackle this job. I found all the necessary info regarding pin diagrams for every connector except for the connectors that plug into junction box 3 (located under the dash near center). It has 6 connectors (labeled a through e) with 20 pins or so each on the 2001 model which looks identical to the 99 setup at a quick glance. I need the exact specs for the 99 tacoma with 2rz-fe engine and manual transmission, its the last piece of the puzzle I need in order to have all the info necessary to take care of this.