Wall socket and ground probe question

[kevsqn]

So i only have 2 sockets on the wall.
the one, im going to use for the apex energy bar.
and the other socket for another extension strip.

so my question is how do i plug the ground probe?
ive read that it needs to be directly plugged to the wall socket.

 

[redfishbluefish]

@Brew12 is the best to answer with detail, but your best to use the grounding probe with GFCI. I personally don't use grounding probes....want that tingle, and don't want the GFCI shutting down my tank.