Exposed metal on cable ends

Hi,

I'm wiring up a system (actually two) in what I hope will be the permanent home. There are *lots* of cables (multiple sources, each with Ys going to two preamps, etc.).

Anyway, I'm struck by the fact that some of the interconnects I'm using have large metal barrels at the end, and I'm trying hard to make sure these don't touch each other when it's all done.

Or does it not matter? If these are the shield connections, is it OK for some of the shields to touch?

thanks

Eric