The controller you posted the wiring of in the first post does not have any way to connect it to an LCD. So you cannot use it with one, unless it has pads for one on the circuit board inside that are simply not wired up. In that case, you'd have to open it up to add those wires, but even then, it may not be programmed to function with one.
Additionally, LCDs are not universal between controllers.
You would need to get the same controller brand as LCD brand; for instance LiShui (LS) has their own LCD series, and the KunTeng (KT) has their own series of LCDs; Bafang has their own series, etc. Even within a brand they are not all compatible with each other.
