To hook up a fitting to the fuel distribution block on the Rotax 912ULS you will need a metric to AN adapter.
Russel Performance makes some that you can get from either Summit Racing or Jeggs if you want.
Part #'s are:
670500 - AN4 to 10mm x 1.0
670480 - AN6 to 10mm x 1.0
Since I didn't install the fuel filter in the line downstream of the gascolator I used the AN4 x 1/4" hose barb that came with my kit and ordered the 670500 from Summit Racing.
Dynon recommends not mounting the sender to the engine so I'll mount it on the firewall and run 1/4" fuel line over to it.
Thanks goes out to Craig for the part number heads up as it saved me some research