Kailh Choc hot swap socket footprint, supporting both Choc V1 and Choc V2 switches.
Suggested LED placement varies slightly between the two versions - the V2 position is denoted by a much thinner silkscreen rectangle than the V1.
The plate hole also has a difference in size of 0.015mm between V1 and V2; both sizes are shown by thin squares inside the outer perimeter square.