All of the instructions you should need to install the modules and wire the panel are in the CH01 assembly instructions. Just click Products->CH01 Chassis->Assembly Instructions.
Presumably I'm doing something wrong, but the link to the PS03 assembly instructions opens up the BOM document. The link to the PS03 BOM document... also opens up the BOM document.
The PS03 is assembled, there are no instructions. For instructions on how to install the PS03 and modules in the chassis, see the CH01 assembly instructions.