Hydraulic valve assemblies for Every tractor, for every type of hydraulic system

If you ask in magnifying glass for power beyond, first answer is this.
It show the tubing.

And this one show, that you don´t even need the T on ls line!
Lso means pipe to orbitrol
Lst mean pipe going to tractor
So I believe one text line is missing in the diagram, saying something like “Ls line to tractor”