found parts
|mainimage=Neutrik XLR 3-Pin Male Receptacle.jpg
|propimage=Neutrik XLR 3-Pin Male Receptacle Prop.jpg
|manufacturer=Neutrik USA
|partname=3-Pin Male Rectangular Flange Receptacle
|available=Readily available.
|character=Boba Fett
|usedfor= Jet Pack greeblie seen on the underside of Return of the Jedi stunt jet pack.
|info=A Neutrik XLR 3-Pin Female Right Angle Plug connects to this receptacle and conveys power to the left gauntlet.

XLR connector at Wikipedia

It is believed this same receptacle was on the Return of the jedi hero jet pack (as seen at the Art of Star Wars exhibit) but has broken off or been removed. The hole in the bottom of the jet pack has been covered over with a piece of black electrical tape.