FIG. 1 is a perspective view of a terminal connector head in accordance with the present design. FIG. 2 is a front view thereof. FIG. 3 is a rear view thereof. FIG. 4 is a left side elevation view thereof. FIG. 5 is a right side elevation view thereof. FIG. 6 is a top view thereof; and, FIG. 7 is a bottom view thereof.