Is it for fitnesscompetition, or for historical appeal?
The only tricky part is getting the spring and clip back in. The basics, though, are going to be the same no matter who is giving you advice. To clean out the groove, you want to clamp the blade flat. If you want to have fun and blade Monty Python jokes, you want a broken laid back club.
This type of problem is less common in higher quality body wires and sockets. Starting with a clean, prepared blade and using instant-curing CA glue, an experienced armorer can have a weapon wired and built in under 15 minutes.
You can then shorten the effective length of the chain by placing the hook through another link further down. If that notch is too small, enlarge it with a round file. This might result in some inconsistencies when wiggling the cord. The stripping and cleaning is one of the most important steps in a successful wiring job: a thoroughly clean groove is essential to ensuring that the glue will hold, far more so than the type of glue used.