65amp wiring/trouble shooting

Mattax said
OR one branch of the alternator output goes direct to the heated back lite relay.

It is like that. I've found the right relay, thanks to @townsend
The wires are wrapped and leading straight to the ammeter (or C13 12BK at least). What confuses me is, there's a fuse block on the chart, but I haven't found one...? It looks like there's nothing in between...

Mattax said
One thing that bothers me as that we haven't identified fusible links protecting the 12 gage wires.
There should be one or two blue fusible links (16 gage) to protect those wires.
If the black fusible link is really black, then its 12 gage and only protecting the 8 gage wires.

You've asked me this earlier, but I didn't understand what wires you mean. I'm assuming you're interested in the ammeter wires R6D / C13. There are not fuse links at all. The only wires with a fusible link I've found were the ones that are already on the chart. Or let's say, what I have found...

How I see, a fusible link is in the standard wiring, on A1B, with another fusible link on the added wire, A1E.

Mattax said
It looks black.

Yes It is. I've checked it again and yes, it's black, but I can't read the stamped numbers.