jayhawkclint's photo shows the three mounting points for the tank. Note the drop bracket in the front center of photo two. In the rear there are two similar brackets on either side (photo three shows the top of one of them). As for the skid plate, it attaches in multiple places. If you have your rig stripped down to the frame, you should be able to figure our where they attach. If you don't, good luck!
The two best off-road vehicles in the world -- the Jeep CJ and rental cars.