the feet with the wheels on,
the bit on the bottom is made from 1 1/2 angle (i think, i should measure it
that tucks under the base, the wheel have been made to stick out 6mm below this. when you screw the levelling screws down you can push them under the base. then get the ratchet strap and tighten them together. then wind the levelling screws back up.
be careful when pushing it around, the mg-12 is VERY top heavy. wouldn't take much for it to go over.