I thought that may be the case. The bodies of Unimogs are three point mounted to allow the chassis to flex. It's mounted on both sides at the rear and that hinge is the front mount. The cab
cannot be raised on the mount, so please don't try!
If you look at the bottom edge of the cab roughly in line with the chassis rails there will (probably) be little tabs with holes in. These are the attachment points for the tilt supports to fit to. There are also a pair of holes in line at a slight angle from upright in the chassis rails - this is where the tilt supports bolt to the chassis. To fit them you need to loosen the nuts on the front mount and lift the front of the cab about 100mm. There's a recent post about the tilt brackets. I'll edit it in to this post in a moment...
Here you go...
http://www.unimogclubuk.com/body-pannels/406-cab-tilt/msg3680/#new