Removed from a functioning 1996 Haas HL-1 Lathe. Everything functioned on box except for the load meter.

This appears to be a digital measurement. Possibly a type of sensor or probe used for precise measurements or positioning. It has a circuit board with various components, cables, and a metal housing with multiple ports or openings. The “+ / – X” & “+/-Y” labels suggest a directional reference. Without additional context it is hard to be more specific about its exact function or application.