There are three molded rubber tubes,680477, 680478, and 680479 plus a TEE 680687. I still have an NOS TEE in the spares for my M-38A1. The orientation of the trays and hoses is easy to decipher once they are laid out. 680479 is 24" long and exits thru the firewall toward the ground. There is a Bracket, 680301 that bolts between the lower front of the box and inner firewall. Two others, 680306 and 680307 attach the lower rear of the box to the dashboard.
The US Army motorpools normally scheduled removal of the batteries and trays in order to clean corrosion and repaint with a brushed on coat of a special Black Battery Box Paint. This was usually done annually by the driver oe a mechanic. I will post pics of the inner battery box of my Jeep next time I do the PM on the battery box.
A 1/2" Copper TEE will work in a pinch although it is a bit short ans 1/16" smaller in OD than the steel 680687. No hose clamps were used to attach or connect the hoses.