I have this:
Looks like a replacement hub I got from my dealer's inventory clear out. I used it to repair a broken tripod. The only problem was that the threads in the leg hinge tabs were tight (6mm?) I had to run them out to 1/4-20. Later tripods are cast in China. I've found Meade's Chinese castings to be very high in silica. This makes them brittle. With a better alloy the hub's design may have been OK, in the cheaper alloy the casting isn't heavy enough.
The #887 (Advanced Field Tripod) that was sold with the LX10 and as an optional ETX tripod was not adjustable and had no spreaders to bring down the cost. The heavy blocks outside the hub are to restrain the legs in the erect position. Otherwise it's the same hub.
These tripods are attached to the scopes in two ways. For the early LX scopes that came with a wedge a 1/2-13 threaded rod with 3" handwheels at each end threaded through the center hole. Under the hub a 3 legged rigid spreader was installed over the rod. The rod then was threaded through the hub and tension applied stiffening the tripod. The wedge was then fit on the rod thread above the hub then the handwheel was installed to retain it. Three additional 5/16-16 bolts secured the wedge to the hub.
For the later LX scopes with no wedge the 1/2-13 threaded rod had one 3" handwheel at one end. It ran through the center hole, which was smooth bored, where it was retained by a circlip. The same 3 legged rigid spreader was installed over the rod under the hub. The scope's mount was centered over the hub and the rod was threaded into the mount and tension applied both securing the mount and stiffening the tripod.