MFT 800, is the height adjustable?

[pixelated]

I've just purchased a second-hand MFT 800. It has two locations for the bolt that secures the top of the legs, is this intended to be a way of adjusting the table height or is there some other reason for this?

I downloaded the manual, but I didn't see any mention of using the top or bottom bolt location.
thanks

 

[Bohdan]

The height is not adjustable. The two holes are there so that the legs will fold up under the table parrallel to each other. The two legs are different lengths to enable this to happen.