The ornamental design for a keywayportion, as shown and described.
FIG. 1 is a perspective view taken from a bottom, front, right side of a keyway portion;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a perspective view taken from a top, front, right side thereof shown on a connector where the keyway portion is part of a female keyway of the connector; and,
FIG. 4 is a perspective view taken from a top, rear, left side thereof shown on a connector where the keyway portion is part of a male keyway of the connector.
The dashed lines in the figures illustrate the portions of the design that form no part of the claimed design. Portions of the keyway portion not shown in the Figures and not otherwise described in this specification do not form part of the claimed design.