The ornamental design for a connectionsocket, substantially as shown and described.
FIG. 1 is a perspective view of a connection socket, showing our new design.
FIG. 2 is a front elevational view thereof.
FIG. 3 is a rear elevational view thereof.
FIG. 4 is a left side perspective view thereof.
FIG. 5 is a right side perspective view thereof.
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
Shading lines shown in the drawings are intended to represent the approximate three-dimensional contour of the design, and are not intended to indicate surface decoration. The broken line shown in the figure drawings is included for the purpose of illustrating environment and forms no part of the claimed design.