The Malvar Junction was located based on the information given by John Paul Warne. The eastward branch is the line going to Alaminos, Laguna while the southward branch is the line going to Batangas City.
Batangas Railways branched near Coca-cola Calamba Plant. Although tracks are already gone, one can still trace the entire Batangas line using Google Earth. The red line is the railway going to Bicol while the blue line is the Batangas branch.