Will They Put A Tiffany & Co. Charm On My Bracelet Right At One Of Their Stores?

i have 2 new charms for my Tiffany charm bracelet (just an oval link one) and i can’t figure out how to open them.
The charms are Tiffany as well, just so you know.
If i went to the store, would they put them on for me?
or if you could tell me how to put them on simply, please would you?
thanks