Interchangeable Tails on Halfsuit? Magnets?

So, first pair of digi legs! As I was planning them out, I realized that I had two characters with the same, solid black leg design. So, I was wondering if there was a way to create interchangeable tails on fursuit digitigrade legs? Please keep in mind I am a very new fursuit maker, but I will be willing to attempt any possible method!!

I was considering magnets, but I'm not sure how to properly do this. Any tips?