Wow, My sidecar hooks into the two holes on the right side of the frame, same place that a popular ign sw. relocation bracket goes to, or other steering dampeners. I got the TEC lefty bracket for sidecar accommodation. Del Boy got a lefty since he has the ign sw on the right. I had first ordered a Norman Hyde dampener but it attached at the right side location and sidecar mount obstructed it. Much more expensive too.
Triumph must've changed that when they went to the water cooled, hi-techie bike in '16... I'll have to take a look at one next time I'm at the dealer. There must be someone by now making a good one for the newer Triumphs?
One more thing in case it comes up, is that the front bolt on mine has a tendency to rub the main wiring harness when you turn the bars all the way. I had to make a little shield from a plastic pop bottle and tape over it. Can't tell it's there now!