TNG Klingon Battlecruiser, and other ships...

[Timo]

Roughly 2.4 meters behind the trefoil symbol on the port wing, to fool the enemy!

Options abound, but the "bow tie" turret seems like the most glorious spot, as the comparable forward fork turret would be beneath this one, and both the delta shapes behind it, all thus subservient to the bow tie.

Timo Saloniemi

 

[DonIago]

Perhaps it's located behind the aft nacelle?

 

[publiusr]

FWIW, there's a D9 class in STO. It's meant to be a TOS-era Negh'Var. Link: https://sto.fandom.com/wiki/D9_Dreadnought_Battlecruiser

Now that is pretty cool