Fighting a "fat" opponent? (my 2nd MMA fight)

Im seeing thread after thread how to defeat the tall person, I am personally the tall person, a slim 6'4. (205)

I have a MMA fight this saturday and my opponent dropped weight from heavyweight to fight me, he is pretty chubby. very, very chubby... at 6'2

I'v always fought lean people like me with reach and speed. How should I fight THIS guy? his arms shorter, his belly bigger, he has heavy hands. I am excited!

Any tips? my apologies if this is in the wrong thread


Ask away! :)

( I'm ready, I'd like some extra tips though, what should I eat, ETC)