Yes, using a screwdriver to widen the gap on the clips helped but it was still a '*****' to insert it.
The front flaps went in slightly easier as I turned my wheels to one side and gave me more room to insert the vise grip. With the vise grip, I was able to compress and insert the clips but it was still a PITA.
Getting the rear was a piece of work as I was not in the mood to remove the rear tires, resulting more sore fingers getting the clips engaged. If I had removed the rear tires, it may have been easier as I would have been able to use the same vise grip to compress the clips in place.