A Delicate Touch

I've been waiting an eternity for these mines! Well, a few days at least. What took him so long?$B$BHere's the low down, compadre... there's this nasty bunch of magnataur--you know, big, hairy, and extremely ugly--and they seem pretty keen on taking K3 for themselves.$B$BNot going to happen.$B$BWe've got some defenses set up in their path, northeast of here. Sadly, our laser turrets have pretty limited power supplies... that's where these mines come in! Get over there and blow them up good!