How do I use my Discount Code?

I can't find a place to put the discount code I have for my group for Friday's game.......I was told to do it here at ticats.ca

Seems like it should be more user friendly.......probably is, just an over-sight on my part.

All group codes can be entered by going to ticats.ca/groups. Once there, enter your special offer code to purchase your seats.