Tricks for installing swing arm bump-stops?

[jcwren]

I'm replacing the bump-stops on the lower control arms, and while getting the old soft ones out was trivial, the new ones are not quite so cooperative. The bottom of the new ones have an "arrow" shape, and I can't compress the arrow to get it into the slot. Part #24 in the image below.

Besides using some silicone lubricant, what's the trick to getting these in?

I'm thinking >maybe< a set of parallel jaw pliers, if I can find a set with narrow enough jaws. There's probably a special GM tool for this...

Thanks!