Afaik first entry found will be used.
But why define 2 same named connections in the first place?!
Usualy i only (unique) name connections if i want to multipath:
fas01tofas03 = multi (172.16.1.1,172.16.1.3) (172.16.2.1,172.16.2.3)
fas02tofas03 = multi (172.16.1.2,172.16.1.3) (172.16.2.2,172.16.2.3)
# Backup Schedule FAS01 to FAS03
fas01tofas03:vol_root fas03:vol_root_fas01 - 1 5-23 * *
# Backup Schedule FAS02 to FAS03
fas02tofas03:vol_root fas03:vol_root_fas02 - 6 5-23 * *