How to install the battery for a Sightron S-TAC?

[Sparhawk77]

I must be slow because for the life of me, I can’t figure out to to install the battery to illuminate the reticle on my STAC.

Usually theres a slot and you use a coin but I don’t see one.

Thanks.

 

[Sparhawk77]

Nevermind, just saw a YT vid.