I got it! I didn't look very thoroughly to begin with, so I looked more tonight. The 950 swingarm has a threaded "standoff" parallel to the axle on the bottom of the arm. One on each side. Beefy enough to hold a trailer I'm hoping! Thread is 10mm.
'06 KTM 950S Adventure
'12 Ram 2500, Cummins, 6-speed auto, Laramie Longhorn, RamBox.