I’m trying to fix my daughter’s electric scooter. The company sent me a brand new motor, out of warranty, however the adapter is wrong (see pic). I’m thinking I’m better off swapping the couplings rather than cutting and splicing, but I don’t want to destroy them - what is the best way to remove the wires? There appears to be some sort of yellow wax/paste holding the wires in.

EDIT: Thanks to all who replied; I’m going to try and splice the wires. Solder should be here tomorrow, so hopefully she’ll be up and running in no time!