The ornamental design for a headlampbracket, as shown and described.
FIG. 1 is a perspective view of a headlamp bracket according to my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a back elevation view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top side elevation view thereof;
FIG. 7 is a bottom plan elevation view thereof;
FIG. 8 is a frontal perspective view thereof as attached to a headlamp; and,
FIG. 9 is a rear perspective view thereof as attached to a headlamp.
The dot-dash lines adjacent to the shaded areas represent the bounds of the claimed design. The broken lines in the drawings illustrates portions of the headlamp bracket and its environment which forms no part of the claimed design.