Identifying the Alternator & Serpentine Belt on the QSB 5.9

Which serpentine belt do I need on my Cummins Marine QSB 5.9 engine? Identifying the Alternator on the QSB 5.9

Cabin Heater & Water Heater Connection Ports for QSB 6.7 & QSB 5.9

  QSB 6.7 and QSB 6.7 Slimline Heater Supply Connection.  Use coolant return elbow behind alternator for return connection.