A switch or jack is not included.
Gibson printed circuit board.
New pcb style gibson electronics.
Bridge pickups switch and ground connections are clearly labeled for easy solder less wiring.
One near new standard pot assembly circuit board from a recent gibson les paul electric guitar.
The switch is a wedge of mahogany sprayed tobacco brown so you could think of it as a bit of a vintage gibson guitar.
1956 gibson ga 40 description 15w cathode biased combo amplifier.
If this were my instrument i would open the control cavity again plug it in and wiggle that light green plastic thing that is near the switch.
Up for your buying pleasure is a gibson les paul quick connect pcb circuit board with long shaft pots and push pull volume pots for coil tapping.
Gnolivos maybe your hum problem is associated with the ground wire not making good connection to the circuit board.
Pup connectors and more.
Made in the usa price 1000 build 2 channel hand wired valve combo with tremolo power rating 4w valves 2x 5879 2x 6v6 1x 5y3.
Fits gibson usa sg or les paul.