Plow depth is controlled by "tilting" the point of the plow. This is done with the adjustment on the plow. You will have to figure out where to put the pin in the lift straps on your own. Every tractor is different. The cam lock on the side is not for the sleeve hitch, just the mid and front attachments. The only float is in the lift straps.
Look at the Brinly manual on how to set the plow. Here:
http://www.onlycubcadets.net/forum/s...ead.php?t=4692