Still haven't worked out how to post pics, but I can describe it pretty well; the "audio system" that came with my HTT is basically a jumped-up clock radio with a CD player and internal speakers, dangling beneath an overhead cabinet. Good enough (Just!) for inside, but I don't spend a lot of time inside during the day! It does, however, have an A/B speaker switch and an open set of wires. I bought a 2-terminal in-wall stereo speaker wall plate (with pushbutton terminals) from Radio Shack, wired it to the B leads and installed it under the cabinet next to the "stereo". That cabinet, over the jackknife sofa, has a double bottom for running wires. An outside access door opens to storage under the sofa. Now I simply run the wires from the indoor/outdoor speakers I got on eBay in through the access door, up behind the sofa and into the wall plate, hiding them behind a nearby curtain and I can listen to music outside as well! Wait! There is that old three-amplifier car stereo system just languishing in my basement....hmmmm...! (Note to self: Bad idea! That thing'll suck your battery inside-out in about 15 minutes.)
P.S., there is a picture of the speakers on Hybrid Travel Trailer Camping, my page on Facebook.