Hi,
I think, this zone is an "internal" zone in EXP-E. So, not visible for the admin.
My guess is, that as soon as you set the EXP-E to serve MRA, this zone gets configured automatically and is "active" all the time. So, you don't need to or can't configure it manually (also since there are not changes to do from the admin's point of view).
About the search rules:
You don't need to manually configure search rules on EXP-C and E, for MRA to work.