Don’t over-think this. The whole Enigma rig can be considered one layer of “clothing.” Then, one simply dons another layer of clothing over the Enigma. Your outer layer, be it trousers, skirt, kilt, dress, bathrobe, kaftan, or whatever, is simply independent of the Enigma. For some folks, the Enigma may be a base layer. For me, I’d rather the Enigma be a middle later, though now that I have a Floodlight-compatible Enigma, a.k.a. Light-Bearing Enigma, I might wear the rig outside my trail-running shorts, with a long-tailed sun hoody covering the rig.
The Enigma is like a belly-band rig, in that it can be worn below one’s normal belt line, at one’s normal belt line, or above one’s normal belt line. The draw is upward, not sideways, like one would do to reach the weapon via the trousers’ zipper opening.
The Lucky Gunner and P&S you-tube videos explain it well:
https://www.youtube.com/watch?v=QxG3aW2cS88
https://www.youtube.com/watch?v=2gR77wwJvmE