Equip the gloves. Click on it to open that charm-popup... and move it to somewhere where it wont be hidden behind your inventory or other popup windows...

Then just drag the charm from your inventory onto the crossed out "holes" in the charm - popup. Afterwards you can close the window...

Note: you cannot remove the charm ever again.

Here is a table of what charms does what

Your existence alone, is excuse enough for the creation of the entire universe… Il you my darling Jeanne-Dré 