By coincidence I completed install of a dual mounted Warm and Safe Heat-troller a few days ago. Pics show the location next to a Datel Voltmeter and the switch that controls fog and driving lights. Each knob/light is on a separate cable and board so you can put 'em side-by-side or whatever. The knob-to-module cables are quite long and follow the route of the Connie main harness from the instrument panel along the backbone then the left tube to behind the battery. Just a bit of patience needed to lace the small boards with the knobs from the back to the front under the main tube.
I got the version with "coax" connectors that match Warm and Safe's liner and gloves; not sure what you'll need to fit-up to Tourmaster. The Warm and safe liner has built-in connections to run the gloves (or pants) on a separate controller out of the left pocket.
I ran the controller connectors out directly over the lift-handle which lets me connect through the side-pocket exit in my Roadcrafter suit. Zip-tie + velcro the module to the frame tube directly behind that location so I've got max length of pigtail out of the bike (also zip-tied the wires tight to that tube so If I forget to disconnect it'll pull apart at the jack, not at the module I hope). Yes, I've gotta be sitting on the bike to hook-up. That location lets me stash the connectors in the tool tray over the battery when not in use.
BTW, if you are a member of COG, register as a "Group Member" on the Warm and Safe website and you'll see prices 20% below the normal prices when you Login to the site. At least that's what Mike Coan of Warm and Safe did when I asked about it prior to my recent purchase of liner, gloves and heat-troller. BIG savings compared to any other source I found.
I did two late night rides (still pretty warm here) testing it all out and the controllers work great - one for gloves, one for the liner. At night the blinking lights take a bit to get used to ignoring, but that's a small price to pay and they're not really distracting after a few minutes; probably won't notice them at all during the day.
HTH