Does anyone know where I can find information on the purpose/use of each connector attached to the 2002-2004 steering column?

I have the WIRING PDF for a 2002, but there are no pictures of the steering column and on the column's switches, no way to identify which connector name (B68, B78, etc.) refers to what. So I don't know which ones I can delete and which ones to wire up with my custom harness and other custom devices of my own I plan on fitting.