[Registered for wrong class]

I was in a hurry to register for this Sundays event and chose the wrong class for my car. 2006 Cayman S should be in B Street according to my reading of the rules. Is this something that can be changed at the event?

[Link to results]

What is the exact link to the results for the January 17 event? When I go to azsolo.com I keep getting redirected to a backup which is from last year. It still says the next event is may 2020 and the latest resulted are from fall 2020. Thanks.