If all that is visible is the cross section of the tag flush with the plastic of the end cap, the chances are slender. A repair would involve tinning the bare metal using solder paint and a very hot iron with a very small tip so as to get in and out before seriously damaging the plastic end cap. A workable procedure might be to use the leg of a suppression capacitor with a longer wire pre-attached as a new tag.
To get to the tag to do a replacement would probably involve removing the cap from the body - small motors are generally not designed to be disassembled and reassembled. It can be done with care, ingenuity and patience, but good results are not common. The tabs holding the end cap in place either refuse to bend straight or go back where they came from, and the sprung brushes give their on problems.