How can I add two limit switches in this circuit?
simulate this circuit &ndash; Schematic created using CircuitLab

You have supplied a wiring diagram rather than a schematic. Schematics are better for demonstrating circuit intent. Here is one which may suit your purpose.

RLY1 is ON/OFF control. RLY2 is FWD/REV control. Motor is assumed to run CW when top terminal is positive.