Installation is easy, simply apply Sikaflex to the underside of the mounting plate and then fix the plate into a beam in the roof of the van, the Promax then fits on to the plate with just 4 nuts.
Position the waterproof cable gland so the cables can drop into a cupboard (make sure this area is clear of existing cabling or piping) drill a 20mm hole and then fit the gland and apply silicon around the cable cover. As per the labels on the cables fit the receiver cable to the "sat in" on the satellite receiver and the "receiver" on the antenna and the connect the controller cable to the controller inside the van and to the "Controller Port" on the Promax. Press the power button and select the satellite you want to watch (VAST is default) and you are watching TV.
This video shows how to turn the SatKing Promax on.