Drilling into heated bed

Hi everyone, I've been a bit of a lurker on this forum and seeing how my mendel i2 is almost done I thought I better make it official

Anywho, my problem is my MkII heated bed has a broken corner mounting hole (see attached photo) from being shipped.
My question is will drilling a new 3mm hole just below it affect the operation of the bed? ie will I be shorting any circuits?

any advice would be appreciated.

See the lighter red squiggly lines (mostly inside the white square)?
Those are the heating element, don't drill into those.
The darker area on the right hand side of the photo is fine to drill into.

Cheers

cool, thanks isolt!