I would be on google looking for manuals for each item. The market was flooded years ago with these units so hurry up and collect what you can because the companies tend to implode taking documentation with them.
I recently inherited a SVAT, 4 camera (wired) system. It was in a storage tub complete with a "fast setup" booklet. The cameras are Model 11002, the Monitor/HDD is a Clearvu II. I've managed to get it tested on a workbench and everything works. My problem is, there is another unit that I have no idea where it connects in the system. It is a model CV301-8CH-X It's an HDD device. Does this thing take the place of the Clearvu unit, or is it an additional storage device that integrates into the system somehow?