Bulkhead Connector Stripped Threads?
You can use this as a start. It shows the general scheme of the main circuits. You can fill in the details and change colors based on what you find and what's in the '65 shop manual.
edit
In the 1965 MTSC they show a fusible link to the horn relay, but the text says that's only on the C-bodies.
page 13 Electrical Accessories & Service (Session 207), Master Technician's Service Conference
You can use this as a start. It shows the general scheme of the main circuits. You can fill in the details and change colors based on what you find and what's in the '65 shop manual.
edit
In the 1965 MTSC they show a fusible link to the horn relay, but the text says that's only on the C-bodies.
page 13 Electrical Accessories & Service (Session 207), Master Technician's Service Conference