As promised from a different thread, here is my method for setting up the TTSE wiring for trailer towing: I did not want to modify or cut the factory wiring and wanted to be able to remove everything in the future with no evidence it was ever modified.
I researched and found the type of connector Triumph used for the tail light assembly (pic 1). I bought mine from this source:
http://www.bmotorsports.com/shop/advanced_search_result.php?x=25&y=8&search_in_description=1&keywords=CONN-75823 I then made a wiring adapter to fit between the factory wiring harness and the tail light connectors (pic 2). The bikes wiring is used to provide the signals to trigger a Hopkins 46365 5-into-4 electronic adapter/isolator. The 46365 provides a 4 wire trailer connector for towing, without causing any canbus issues, since it only needs a very low current signal as a trigger. All power for the trailer lighting is pulled direct from the battery.
The Hoppy isolator is mounted free floating under the pillion seat (pic 3). With the tool kit in place, it is held nice and secure, with no new holes anywhere.

The 4-wire flat connector runs along the trailer hitch, and to stop it from flopping around, is held to the bottom of the hitch plate with a Hopkins Mag-flat mounting bracket bought locally.
I did get a chance for a short test ride pulling the camper trailer. It weighs about 350 pounds loaded with gear (roughly 160 kilos for those on the other side of the pond), and feels similar to a passenger. I do use a little common sense when towing by slowing down in advance, and don't push cornering. I am sure that much weight would tend to push the rear if braking while turning. Other than that, power is not a problem and the TTSE makes a great tow bike!
April 22nd I will be heading out for a spring campout, pulling the trailer for any real distance for the first time, but from the test ride I don't expect any issues at all.
This wiring setup could also be used to add almost any lighting you can imagine to the TTSE. Because the isolators 4-wire output uses a combined turn/brake to a single bulb, A simple method would be just use posi-tap connectors from the tail light assembly wires for signals to the Hoppy, and use the 4-wire output to power auxilliary running/brake/turn lights. Now time for the most important part of the job . . .

CHEERS!