OpLoc messages are fired when a player clicks one of the five (excluding oploc6) options on a loc in the game.
whether the control key was held down, used to invert movement speed
the base(non-multi-transformed) id of the loc the player clicked on
the option clicked, ranging from 1 to 5 (inclusive)
the absolute x coordinate of the south-western corner of the loc
the absolute z coordinate of the south-western corner of the loc