That’s been debated before. Some say yes, some no. I didn’t use them on mine, no problems.
Theory being that it allows them to open to far, or to sharp of angle.
No matter, clean the screws and cage holes with brake clean or something and use loktite.
Tighten boot screws incrementally in a crisscross pattern. You’ll have to look for torque spec, it isn’t much 7 inch/pounds IIRC. Some use gasket on both sides of cage to avoid leaks.
You really should do a leak down test after