[CWizard]

On my TKO-600 there is what appears to be a round plug high on the driver's side, near the front. It's about an inch across and has a hex hole for an allen wrench. Anybody know what this is? I have a leak there, and thought I'd try to get a little more info before messing with it. It's not a drain or fill plug, those are both on the other side.
Thanks in advance.