The mirror universe ships come with their own unique mirror universe skin, of course. But I think they should come with their own mirror-style bridges as well. A darker version of the standard one(s), with lots of Terran Empire logos on the doors and whatnot.
What do you think?
"With the first link, the chain is forged. The first speech censured ... the first thought forbidden ... the first freedom denied ... chains us all irrevocably."