Help re: progesterone inserts

Hi all, I have been prescribed progesterone vaginal inserts by my doc.  I am supposed to start them tomorrow, and my doc's office is closed.  I'm just not clear on how I'm exactly supposed to use them.  There's no applicator or anything...how far do I have to put them up?  Do you use a finger, or is there supposed to be some kind of tool to use?  Thanks for your help!