Reel Help

Hi I just picked up a VanStaal vs100g. Someone had a machined handle made for it but they sent me the parts from the standard handle in case I wanted to put that one back on. The problem I'm having is that I don't know where the part that is shown in the middle of the picture goes. I was hoping that either someone could let me know how it goes in or email me a schematic for this reel so I can get some idea. Thanks
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Thanks Joe I got a schematic from VanStaal and it turns out that the guy didn't just put knob parts in the bag he also had the clicker in there which was what the middle part was.

i was going to say it was the drag clicker......