Figured it out - We used the blue adapter that came with our skimmer and simply stuck the adapter cone into it - had to fold the edge a bit to get it in, then pushed it in until it fit - worked like a charm!

Now we have another problem - not enough suction with the dual inlets. We were able to do a temporary fix by placing a plastic tupperware lid over the other inlet (the section held it in place), but are wondering how necessary that second inlet is....maybe I'll start another thread.

Wanted to leave this here for anyone experiencing the same issue.