The sticker on the I/O Expansion Chassis says that you have 2x DZ11 boards that provide 8x serial ports each. These should be wired to serial connectors in the right of the cabinet. It also says that you have another RH11 Massbus controller that was originally connected to one or more TU45 9-track, 45 IPS, Magnetic Tape drives. The last option on the sticker is the LP20 that connects to an LP05 or LP14 line printer.
In the image I see two M7819 DZ11 boards at the right, the Magnetic Tape RH11 in the middle, and the LP20 at the left.
It looks like your KS10 is complete. The two weak points are the shoebox sized power supply, and the CSL board for the system console. You could work with your technical people to check the power supply capacitors and power it on with a dummy load instead of the KS10 chassis. If it works OK you can connect it to the KS10 chassis and do a smoke test. You might even see a KS10> prompt on the serial console at this point. If you have an RM03 or RP06 and a bootable disk pack containing TOPS-10, TOPS-20, or ITS you might get it to boot. If not, you will need the KS10 diagnostic magnetic tape and a Massbus magnetic tape drive. Then you can boot the diagnostic kernel from magnetic tape and run diagnostics. The disk formatter tool is on a separate magnetic tape. You will have to format a pack and then you can run diagnostics to make sure that the disk drive is working OK. Lastly, you will need quite a few magnetic tapes containing the TOPS or ITS installation tools. There are many examples of a TOPS installation with the KS10 Simh simulator.