Link defect to req from Defect module with licence Defect only

Hello,

Our dev in future will only have access to Defect module (they will use Defect only licences).

But we need their will be able to link Defect to requirements. It's seems difficult as they don't have access to Req. module and when I have a look on Linked entities tab in Defect details dialog box, buton is grey.

 

Maybe in permission ? or in dialog box config for a developper or in workflow?

Main question is it possible anyway the mean.

 

THanks !!

beckie