Why not just say you have metals that aren't purely stationary or don't strictly have a single shape or size?
The socket has all the same ports, but the socket protecting it can shift to re-arrange the ports, their input requirements and the socket housing's shape and clasps to take whatever kind of plug it needs.
If a weapon does not expressly meet the requirements of a user, special modifications are often needed. In fact, equipment is often sold pre-modified to meet the needs of a specific, exacting and generally exclusive audience.
We're a high technology setting. We're allowed to fudge things a little: almost all starships have engineers and machine-shops who I would imagine are ESPECIALLY TRAINED TO DO THIS VERY THING. Relocate a few components.
Yes, it will look very different. It might need basic adjustments, extensions or even need conversions from other components borrowed from units in storage.
Conversions were done on medieval suits of armor all the time: those sodding things costed more than a house to make and if someone grew, suffered an injury or died in them, you didn't leave it for scrap: You made changes.
Given how manufacturing is in the SARP, I imagine this gear isn't just issued but it comes as a battery of parts in a case issued to a machine-shop or fab and then the proportions of common users are made and the parts are assembled. Given how there are high profile combatants, I wouldn't be surprised if they got specific custom orders every so often.
When technological proficiency, fluency and proliferation are so consistent, this honestly isn't a tall order.