I have a TSIO-550-E (for an ES ) which has a primer solenoid (?) on the throttle body.  Can anyone help with how this is to be wired?

I have noticed several builders that have put a primer button near the throttle (or key) which I thought was just a momentary high boost (to the dukes pump).  Is it also wired to the solenoid on the engine (STDP momentary button)?

Rick Titsworth