well, that was fun! I climbed in the attic, and traced the coax outlet I wanted to use in the master bedroom. The coax line was unplugged into anything else, and just tucked under a bunch of insulation. luckily, it was long enough to route to the main/root splitter. I just have to wait for the four way swm splitter I ordered to show up to rehook everything up the way I want it.