wire do you recommend to get wiring schematics and pinouts

wire do you recommend to get wiring schematics and pinouts

More info' would be useful.

Usually you can find aftermarket ECU and PDM pin info' on their web sites, car manuals are usually a good place to start for vehicles but, failing that, you should be able to find them on-line (although some sites do charge a fee), or you should find an on-line club/forum for your vehicle where you may be able to get the specific information you want.

Factory Workshop Manuals are really required for most projects. Ideally digital versions so you can search them.