Just to make sure we're on the same page, you're looking for Touratech, not Trail Tech. The parts you are looking for is the 18mm pannier mounting kit. One kit gets you the parts for a single pannier, so you'll need two. I would recomment looking at putting a Pelican case on there with the TT mounts. You could order one from Caribou (see Vendor forum), just without the mount points, then add the TT mounting kit... or you can just order a straight pelican in whatever size you need and adapt it entirely yourself.
The racks that I have are the factory KTM racks. Any of the Touratech bags will fit right on b/c the KTM bags are just re-badged Zegas for TT. If you order the Zegas with the mounts pre-installed from TT, they sit at the correct angle on the racks. You cannot order the 29 L from KTM for some reason, have to go right to TT. I am very happy with the size / width of this setup.