1972 Cuda single piston caliper.

How do you guys go about getting the rubber boot, that goes around the piston, seated into the groove on the caliper while sliding the piston in.

Techniques?

Thanks

1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500