This auction is for the Rear Speaker Wiring Upfit Plug with Connectors for the Ram Promaster 1500 2500 and 3500   

Rear speaker wiring prep is available as an orderable option. 

(Sales code RED) Included with this package is the up fitter interface connector. 

(Sales code BC3) This option cannot be added at the aftermarket or by the dealer. 

The connector is located behind a panel at the base of the passenger side B pillar. 

Remove the panel to expose the connectors.