A reversing DOL is like to DOL starters mate, one connects the the motor windings one way, and the rverse button starts the motor with two phases switched round, they have interlocks to stop you pressing both at once. (This only applies to 3 phase DOLs by the way).
IS the light a TRIP light or a Run light?
Now this is the way I would do it, others may do it different. From the control supply to a normally open contact on the contactor then the lamp. This lamp supply would be separately fused and not at 400V. Our company would not allow 400V control.
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