server-backend/base_external_dbsource/security/ir.model.access.csv

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
access_base_external_dbsource_group_system,bae_external_dbsource_group_system,model_base_external_dbsource,base.group_system,1,1,1,1