The ornamental design for the portable detachable step for connecting to the front bumper of a vehicle, as shown and described.
FIG. 1 is a perspective view of the top end and one side of the portable
detachable step for connecting to the front bumper of a vehicle embodying
the invention;
FIG. 2 is a perspective view of the same end, side and bottom of the step
shown in FIG. 1;
FIG. 3 is a view of the other side of the step shown in FIG. 1;
FIG. 4 is a view of the other end of the step shown in FIG. 1; and
FIG. 5 is a right end view of the step shown in FIG. 1.