His bow is a take down.
He can add a quiver to the limb bolts, or go with a GN strap on.

I would advise against any bushings.

FWIW my first Blackwidow in '87 got bushings, as I did not know what I was going to like.
Soon learned I didn't like bushings.

If I ever come across that old bow, I'll buy it back, and yank the bushings, fill and have the riser painted black.
Just to get my old bow back...........that kinda cool.
But it sure as heck aint gonna have bushings if I do.

Bought two metal riser widows guys drilled for quivers. Filled an repainted both of them.
Takedowns................quiver bolts to limb bolts. Clean and no extra holes.

Guess some folks are just addicted to Quikee Quivers.
I aint one of them LOL