Hi Paul,
I'm using role SAP_GRC_NWBC and that allows me to view Access Management -> Emergency Access Management -> Owners -> Assign.
However, I created Firefighter ID's in backend (ECC system) and Owners/Controllers in GRC box.
Then,
1. Assigned Owners to Firefighter id's
2. Assigned Firefighter id to Firefighter user id
3. Logged into GRC box and executed GRAC_SPM or GRAC_EAM and fighter id exist.
Not sure, if this help you.
Regards,
Salman