72 Chrysler engine harness
The MyMopar aftermarket diagrams are not always correct and can be somewhat simplified. You can download the 72 shop manual (factory) and it should be much more accurate
Exactly what model are you working on?
Q1 likely goes through a fuse link to the starter relay battery stud
Don't understand Q2, can you elaborate?
Q3, yes, field wires don't matter which is which