Best padlock to secure several Dell workstations? (prevent GPU & SSD theft)

I donate my time to a community center, who has four older computers. I'm installing SSDs, and low-end graphics cards. Even though the computers are physically secure in their location, there is a reasonable chance that components could be stolen out of them. Dell Optiplex workstations have a lock hole (not the kensington) which is designed for a combination or key padlock. I was thinking that the padlock would be simplest, but I'd prefer to have one key that opened all 4-6 locks (one lock per computer), so it was easier to manage. Any suggestions?

As always, thank you for your help.
 
Solution
You can often buy padlocks in matched sets that all take the same key.

Though I am two minds on this one. You are expecting someone to steal components out of the PC, but not just take the PC?

I think adding a lock just advertises that there is something valuable inside.

Eximo

Titan
Ambassador
You can often buy padlocks in matched sets that all take the same key.

Though I am two minds on this one. You are expecting someone to steal components out of the PC, but not just take the PC?

I think adding a lock just advertises that there is something valuable inside.
 
Solution
Depending on the environment there are metal seal straps that are used on rear doors of trucks and cargo containers. More of an anti tampering device than actual secuirity. They're usually numbered. it will let you know if the case has been opened. They're kind of like metal tie straps.