proclear 150 wet/dry sump don't no how skimmer works

There is a skimmer with my proclear 150 wet/dry. I bought a system used, don't know how to set up the skimmer. I have a pump connected to a pvc open end and also a T with a sm vinyl hose and valve. Here is a pic. If someone could let me know how this is supposed to work that'd be great.

 

Where is the bottom of the skimmer?
Pro Clears are very easy.... There should be a hole on the side that the PVC from pump enters, there will be an airline tube that enters pump to add air to the mix. The skimmer looks modified to me, at least it looks different than the other Pro Clears Ive seen

Good luck

 

yes it looks just like mine,but yours does not have the bottom of the tube and bottom plate the pump sits on?

 

I finally found the instructions. Since this is the one that comes with the sump it is a little different. The body just sits over the manifold (open end of the pvc attached to pump) in the sump and the air intake valve goes up out of the tank somewhere to adjust.