Orion Dovetail L Bracket Question

[04Stefan07]

Picked one up today from Bintel for mounting my PST to my SLT mount and it works perfectly! Also I didn't know the SLT can slew more than 360 degrees which is pretty good, thought there was a limit.

Can anyone tell me what this plastic part is used for (highlighted in red)?

[coldknights]

Hi it is a tightening lever page 4 of the Orion Teletrack mount I have one on my mount for my time lapse rig.
I put my Canon 5D mark 2 on it tighten the knob and push the lever to secure it.

[04Stefan07]

Ah excellent! Thanks :D.