Hi
yes it is possible to damage that it such a way, but normally These cable are quite robust.
Additional in your case i think the problem might be the cable that is goint from the brain to the sub-d25 pol connector on the back. I think you have not touched it.
Anyhow, it is is not that difficult to make such a cable by yourself. You do not have to solder, it is a simple "click -in" System.