There are two four-socket, recursive-current, subspace-grounded outlets in Roger's quarters. The leftmost one has a Quartrzebie Portable Quartz Heater plugged in at all times. The rightmost one is unused during Space Quest 6, although it's possible to stick one's fingers in it.
In the SQ6 Demo, the ClapMaster™ was plugged in that outlet at first and when Roger yanked it out, one of the pins got stuck in the outlet. Roger had to use a pair of StarCon Pliers wrapped in duct tape to safely retrieve it and reattach it to the ClapMaster.