Speedo drive terminal

Hi guys
Bare with me as I am new to this site,my speedo recently stopped working so after a bit of online homework I disconnected the worm at both ends and run it with my drill.This confirmed that it wasn't broken.
I looked into the speedo drive with a torch and it doesn't look square and I can't see it spinning when I turn the front wheel so I have ordered a new one.I suppose the question is if it the speedo drive terminal is it easy to replace or when I remove it will I open up a can of worms ?
Cheers for any advice in advance,chilli
Bare with me as I am new to this site,my speedo recently stopped working so after a bit of online homework I disconnected the worm at both ends and run it with my drill.This confirmed that it wasn't broken.
I looked into the speedo drive with a torch and it doesn't look square and I can't see it spinning when I turn the front wheel so I have ordered a new one.I suppose the question is if it the speedo drive terminal is it easy to replace or when I remove it will I open up a can of worms ?
Cheers for any advice in advance,chilli