A 340 Tach question....

hi bjr....
thanks for taking the time to reply ... here's a picture of the back of my 68 factory chrysler tach ... there are only two threaded polls ... one with a tab and one without. i'm assuming that the other bolts with nuts are holding part of the inside of the tach.

do you have any ideas on which poll would be red and which would be black?

thanks again..
jim coster, pittsburgh
a formula s lover...