68 Dart Circuit board query

Dana knows the Dart panels.

Important thing is the power is insulated. Some use fibre washers. Might depend on the amount clearance around them.

Not sure what manual you have that's amiguous.
The '68 Plymouth FSM is pretty specific.

Here's this is a snip from the '67 Barrcuda I made a copy and printed off to have with me in the garage when I was working on it.
1665186031403.png

Also used it to mark up and keep track of the wire positions on the pins.
1665186103217.png

It also had a step by step on how to remove it. While not perfect it was a decent guidance. Dana probably can say more about the Dodge books.

Thing is these car lines are different in the '60s and also there are minor but often important small changes to the wiring from year to year. So you really want a '68 for your '68.