What is this switch?

Ummm, we were talking about this in PM's and I told him to run a positive wire from the battery, to the module terminal, and then to the coil positive and crank it to chk for spark.
I was under the impression that it was cranking but not starting, is this the case?
His car quit awhile back because of no spark and they decided to put HEI in it.
He say's he has bought all new coil, module and distributor, so if it is wired correctly (as he has told me it is) according to the picture I gave him for a four pin module it should have fire.

He told me, the module is grounded.
The distributor is new.
That there is power to the coil and module.
AND that the distributor is turning when it cranks.

So there is a ton of background info was wasn't in this thread yet, and I think unless we have all the info in one spot we are pissin in the wind.