The ornamental design for housing for a jack, as shown and described.
FIG. 1 is a front perspective view of a housing for a jack in accordance with the present design.
FIG. 2 is a left side view of the housing of FIG. 1.
FIG. 3 is a front view of the housing of FIG. 1.
FIG. 4 is a right side view of the housing of FIG. 1.
FIG. 5 is a rear view of the housing of FIG. 1.
FIG. 6 is a top view of the housing of FIG. 1; and,
FIG. 7 is a bottom view of the housing of FIG. 1.
The broken lines shown in the figures are included for the purpose of illustrating portions of the housing for a jack and form no part of the claimed design.