The turrets should be turning around when there's an enemy in range even if they all start out facing right. Is this happening for the gauss turrets as well or just the lasers?
It was happening with the regular turrets, but I found out the problem was I wasn't supplying them with enough energy with the windmill generators, that was my bad. Thank you for checking.
One thing I would like to suggest are icons above structures to let you know if they aren't getting power, it would make a good way to quickly know if you need to build more generators.