Thanks a lot Keith...,
Now I understand what you are asking for.
Well, the wiring harness ...
most of the part inside the passenger compartment is located around the inside of the fuse box...; so, around the steering column so to speak.
Therefore, what you already see on the pic you are referring to (that's Alfred's former 66andblue car...
) is the most prominent section of the inside wiring harness.
The only "stuff" that goes accross the dashboard is the loom that feeds the cigarette lighter, the illumination for the heater levers, the clock and blower motor & switch, the glove box light and finally the right hand side door contact switch. So, a rather slim arm/branch of the whole wiring harness.
And that one goes just behind (the visible part of) the dashboard, behind/under the radio ... just behind the lower visible chrome strip.
I think to remember there are clamps for sure... So what is visible on Alfred's pic is already part of the loom that goes to the right hand side of the dashboard.
Yes, I do have pictures about this when I disassembled my car 7 years ago ... but it's no longer on my computer ... have to dig deep for this.
Hope it still helps a bit.
All best & good luck!
Achim