You’re trying to make a mechanical AND gate. Easy-peasy, even if I don’t know the pinouts of Bosch relays. Trigger A goes to the coil of Relay A, the other end of the coil is grounded. Trigger B goes to the coil of Relay B, and the other end of that coil is grounded. Wire the SPST contacts of the two relays in series, and you’re done.
Only detriment I can think of is that the triggers have to stay hot for as long as you want the whatever it is to be on.