As far as I know, control tower weapon attachment isn't moddable/customisable. I would love to be able to modify it further by being able to attach it to turrets for example. As far as I'm aware it's not possible to do so right now. I believe it's a small change, but - just like the cargo bay custom capacity - it'll allow some interesting modding additions (E.g. aforementioned control towers on top of a turret).

I know that one of the modders within the community is highly interested in such a feature and it'd be great to see it become a possibility.