How 'remote' is the drive from your office? You will probably end up doing some economics here as your choices are:
- hard-wire an additional stop button into the stop circuit or
- use a wireless control to operate a normally closed relay in the stop circuit.
The economics come into play deciding which method to use. A wireless control and matching relay may be expensive enough to pay for a lot of conduit and wire, especially for a small control circuit like this. If a wireless control is cost effective or required, you will need to be sure that it is a type that won't be subject to false operation due to stray signals or interference.