The ornamental design for twist lock for a multi-position ladder, as shown and described.
FIG. 1 is a perspective view of a twist lock for a multi-position ladder showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left elevation view thereof;
FIG. 5 is a right elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the twist lock for a multi-position ladder and form no part of the claimed design. The broken lines showing a portion of a ladder in FIG. 7 are for the purpose illustrating environment and form no part of the claimed design.