Rebound Adjustment on 04 Predator

[NBen71]

I bought a used 2004 predator just before christmas and i am new to the Fox racing shox. For the first few months i was strictly trail riding it so the suspension seemed aldjusted alright the way i bought it. However, lately I've been jumping it at my friend's track and i noticed their wasnt much rebound on the rear shock and when i went to adjust it i couldnt find anyway to do it. I was wondering if i'm blind or if this brand just isnt adjustable?

Rebound adj will be twords the bottom of the shock and looks like a screw which you twist in or out. Never have it twisted all the way in or all the way out as it can cut off air flow. Compression twords the top which is the same way.