Go to
www.mymopar.com and download a 1972 Factory service manual.
IIRC '72 is the last year for electrical diagrams that don't need some assembly to use.
IIRC '72 also has some cable routing.
The advantage of the factory diagram is:
a) The circuit, wire gage and full color code are listed.
For example, Q3-12BK* will be switched accessory, 12 gage Black with tracer.
b) The connector shapes and wire positions are drawn as they look (or close).
c)They are usually more accurate and detailed than aftermarket diagrams like the one above.
