Positive ground tach

[james1savage]

I have a really dumb question but are going to ask it anyway.

Recently had a Sun D-1 tach converted by Williamson to not require the sending unit. My Model A is the first positive ground car I've owned and don't know where to connect the "trigger" wire for the tach.

I don't want to risk screwing the tach up, can someone please advise me where to connect the trigger wire from the tach.

I appreciate everyone's patience with my questions. You're all really a big help.