The electric thing is not a jet, its a cut off solenoid. It literally blocks fuel to the needle valve as you shut off the ignition key.
There is only one slow/idle jet, its a very thin tube shape and is in mid of carb, it can have a screw head or even a hex head (looks like a bolt)
The two other jets are the primary and secondary fuelling jets, the last non adjustable jet is the accelerator pump jet which is not removable, however you can adjust the pump stroke to control when the pump will spray.