They match the style of proprietary A/V control system ports used in 1990s conference rooms, Projector control interfaces, Crestron / AMX / Extron wall plates, RS-232 or RS-485 wiring inside custom housings.
They were used to connect Projector control panels, Motorized screens, Audio/video switchers, Touch panels, Old teleconferencing gear.
No problem, being old has to have had some benefits lol. This was my shot.