Those are definitely aftermarket wiring, and if they are routed directly to the battery and not switched, may well be the cause of your battery drain issue.

You might try pulling the fuse on the red wire, and see if you no longer have a problem.
Also look and see what isn't powered any more, and you'll know what was hacked into the car's wiring.

__________________
-Josh
Testing the cheap Mercedes axiom, one bolt at a time...