The photos show the cam lock water or gas can facing forward on the side of the jeep with the can sitting directly on the step and a strap securing the can mid-height. No carriers were seen mounted on the step.
All the USMC photos I have for the PTO show only cam lock water and gas cans, however there is one photo on Saipan June 1944 that has both the center mounted gas cam lock can, a larger cam lock water can, and one can with a cam lock on the right side of the can looking at it from the front. I thought all USMC gas cans had the cam lock in the center of the can?



