Add An Availability/Search widget to another website for Booking

Currently you can show your property listings on another website via short code. That is great, but we would also like to be able for people to be able to book on that website as well. Can you add another URL field for a 2nd URL spot or maybe comma separate in same field? We are approaching clients that also want to book on their own websites in addition to our own and being able to book the same properties on both website would be very helpful.