Bed location switch

Questions they keep a coming.  Next to the’fuse“ panel on the passenger side bed, there is a large rocker switch.  Lifting the mattress and peeking in the inspection hole I can’t figure where the wires go. Any ideas? 
Now while looking in the same hole, there is about a 2’ piece of clear hose attached to a “T” immediately coming out of the water pump.  Could this be a siphone for a jug of RV antifreeze?

Op again, previous owner finally answered my email(2 days).  The switch turns on some lights under the awning.  They have no idea what the clear tube coming out near the water pump is for.
Sure more Q’s to follow.

That tube is your siphon hose as you guessed. There is a little turn valve thingy in the line close to it so you can change to draw through the hose. Remember to turn it back when you are done.