Recent run

On a recent run i got a pick up load of white towers and cords and alot of flat screen monitors.
I also got some all in one towers. I was checking them out to see if i could get them running but alas i only got one power supply with them and they all have the proccesor and harddrive missing. Can i pop one of the ones i have stashed from all the dissambled pc's or do i need a specifc one. Also i got some boxes, they called them switches or servrrs. Not sure but they said they were working. How do i check
Them.




What are these wires