I claim the ornamental design for a device for connecting a tow bar to a vehicle to be towed, as shown and described.
FIG. 1 is a perspective view of a device for connecting a tow bar to a vehicle to be towed showing my new design;
FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image thereof;
FIG. 3 is a side elevational view thereof;
FIG. 4 is an elevational view of the opposing side thereof;
FIG. 5 is an end elevational view thereof;
FIG. 6 is an elevational view of the opposing end thereof; and,
FIG. 7 is a reduced top plan view showing the invention in use; the broken lines depict another device which is the mirror image of the device for connecting a tow bar to a vehicle to be towed and which is used in conjunction therewith; the remaining broken lines depict environmental structure for illustrative purposes only and form no part of the claimed design.