with as much difficulty as possible

you need to be able to turn them but apply as even amount of pressure and you can as too much will snap the plastic

you should be able to get a small screwdriver underneath the plastic and use it as a lever to just break the seal

but as said, pour loads ond loads of wd40 down the sides to get it shifted, but don't drown it as ultimatly this may mean that you'll drown the grease that's in the bearings as well as the abs flywheel is part of the bearing kit