drag and drop project properties to service endpoints

Hello,
I currently load a bunch of WSDL using the project load script. I then copy over these values to the service endpoints tab so that my endpoints look something like
${#Project#SmartRecommendationsService}

This allows me to switch the endpoint at initialization.

I noticed that I can drag and drop the project properties in the soap requests test steps so that ${#Project#SmartRecommendationsService} is automatically generated. However I cannot drag and drop the project properties to the service endpoints tab.

This is definitely not urgent but if its not too hard to do, it would make things faster for my team.

Thanks

Ali