missing power cable

[daxm]

I'm playing Penumbra Overture and am now stuck.

Previously I've been room where the dirt digger is. (I think it is in the Auxillary Mine.) I had plugged the power cable into each end (where it is supposed to be) but then, for other reasons, I reverted to an earlier save point and now when I enter the room there is no power cable to plug in! I've attempted to revert to even earlier save points but to no avail.

What should I do?

Oh, I'm running Ubuntu 10.04 x64.