What is this underdash wiring called?

[Enriquez2000]

Below is a link to the uber electrical manuals, and it points out what connector is where. C101, c102, c103 etc.

there are diagrams in these manuals of the car and they point to all the connectors, then you look up that connector and it gives the pinout and colors etc.

The manuals are quite overwhelming at first, but they contain so much information.

https://shark.armchair.mb.ca/~dave/BMW/e30/

Why does that link include "dave" ? creepy.

I did download this already but havent looked on the computer to dive in... hard to see anything on the phone.

It would help if I knew where to start with the white junction boxes on the interior firewall area with what they are.

no one spoon feeds here I get that... just hoping for a bone on where in the manual this might be

[e30davie]

Below is a link to the uber electrical manuals, and it points out what connector is where. C101, c102, c103 etc.

there are diagrams in these manuals of the car and they point to all the connectors, then you look up that connector and it gives the pinout and colors etc.

The manuals are quite overwhelming at first, but they contain so much information.

https://shark.armchair.mb.ca/~dave/BMW/e30/

Why does that link include "dave" ? creepy.

[Enriquez2000]

I will absolutely look at the diagrams to figure out what each wire is.. but I cant figure out what to search to find these underdash pinouts