I believe the bolt you can twist with the electrical connection would be either a high idle solenoid to kick up idle speed when the AC is on OR a solenoid to slow the closing of the throttle when you let off the gas suddenly (emissions thing)

79 Lil Red Express - I'll finish it someday
94 2wd Ram 1500 5.9 Donor for...???
78 CJ7 4.2 with Clifford Cam, Holley 390, 4" on 33's
1992 W250 Cummins
2013 Ram 4X4 Hemi Crew Express
2005 Ex Cab Dakota 4x4 4.7 Daily Driver
1993 2wd Ramcharger 5.2/auto