Poorly worded and unclear to the max. The wire has to get to the system somehow. If it doesn't go through sheetrock then it goes through floor. The usual procedure, what I did, is from the panel go either down under the floor or up into the attic. Mine was easier to go under. Had to drill a hole in a joist at one point but basically it hangs underneath. Then at the room drill or cut and slide the wire up the foot or so it needs to go to where you want it. Then from inside the room you cut your outlet box hole, and look or fish around until you find the wire.
I've done the same several times for cable, HDMI to overhead projector, and plumbing. Its all the same. Only different.
I've done the same several times for cable, HDMI to overhead projector, and plumbing. Its all the same. Only different.