I think it was Orange to Colfax to LaSalle street, and then across the river to the small yard at Hydraulic. However, if you walk by or check the google maps, the ROW appears to go down the NS another block to follow Washington street.
Did the freight service to places like NuWay Seed and Cummins wallpaper end when passenger service ended?
Look at this website - it's got lots of great South Bend Street Running photos, including many local freights with boxcars. Today, I don't know if there's any freight customers in South Bend.
http://www.monon.monon.org/rr/southshore.html