I guess there are two ways to treat the TOS (and, essentially, TOS-R) phaser VFX:
1) Phaser emitters are located inside the ship, and the beams created by them become visible only some distance from the hull. No surface feature need correspond with an emitter, then. (Maximum compatibility with TOS VFX here.)
2) Phaser emitters pop up for firing, and the beams created by them become visible at the tips of the extended emitters; the emitters themselves are completely obscured by the glare. (Maximum compatibility with ENT "precedent" and TMP "postdecent" here - plus with the relevant VFX of ENT "In a Mirror, Darkly".)
Pop-up phasers just ahead of the bridge would then produce the result seen in TAS, while pop-down phasers just ahead of the lower sensors would produce the usual TOS result. Pop-up phasers above the hangar would cover the aft angles, and pop-down ones at the secondary hull bottom vertex might be postulated to cover the dialogue about "amidships phasers" while remaining consistent with the TMP phaser placements.