You need to take inventory of the plugs. Not every controller supports a display. That one doesn't seem to bear any brand markings to suggest what display it might get along with.
If you post a foto that shows all the plugs, maybe we can help you by process of elimination.
If the battery power plug has a thick black wire, a thick red wire, and a smaller red wire attached to it, then the controller probably doesn't support a display (because the smaller red wire is the enable switch rather than the display having that function).