Being a custom grip maker I will say that the Contender and the G2 are angled the same. The difference is the location of the through bolt hole. The Contender is more in the center of the inlet. The G2 is more to the top of the inlet.
I once had a rhynite grip that I had to pull the wings apart to get it to slip on the frame.
Yes, looked at your pics and it appears to be a contender. Looks also all you need to do is pry the wings out and it should slide onto the frame.