Matey,
Unfortunately I cannot find the power cable for my scanner. I must have thrown it out during my recent clearout.
If you want to post a pic of the broken trace on yours, I'll compare it and advise which pin it should be connected to. Best I can do I'm afraid.
(Arse, my scanner is now useless with no 15V adapter for it. Must be more careful when having a clear out next time.)