Assuming you are in Montserrat already.
MVO is signposted from Salem.
Coming from the north, turn sharp left at Desert Storm and drive uphill on Hope Drive almost until you run out of road. Turn right and go downhill and up again. Just after the road turns to the right, take the road on the left and drive until you get to the top of the hill. You are at MVO. Unless you got lost.
Coming from the south, drive into Salem, do a U-turn, then follow instructions for coming from the north.