It is time for me to look for a new growth opportunity elsewhere and I plan to contact some recruiters. However, recently my company suddenly decided to open the option to use external recruiters to fill the two openings, one of which is a replacement of my direct who recently left. My role is to explain the technical requirements of the opening to the recruiters and help HR locate the right candidate for interview.

What is the best way to establish the relationship with the recruiters in this case?