Hi I have a used trail-lite 8280 TT that was partially renovated when I bought it. The sink seems to be missing the hardware to attach it to the counter top. Here is a pic of the molded sink anchor ...
Some installers don't use the threaded clamps anymore, choosing to use silicone or other adhesive to hold the sink in place. It seems to work as I've replaced sinks with only the adhesive and they haven't moved or leaked for the life of the installation.