Barbell Connector

FIG. 1 is a front, right and top perspective view of a barbell connector, showing my new design; FIG. 2 is a rear, left and bottom perspective view thereof; FIG. 3 is a front, right and top perspective view of the barbell connector in a use state; FIG. 4 is a front, right and top perspective view of the barbell connector in a use state; FIG. 5 is a front, right and top perspective view of the barbell connector in a use state; FIG. 6 is a front view thereof; FIG. 7 is a rear view thereof; FIG. 8 is a left side view thereof; FIG. 9 is a right side view thereof; FIG. 10 is a top plan view thereof; and, FIG. 11 is a bottom plan view thereof. The broken lines shown in the drawings illustrate portions of the barbell connector that form no part of the claimed design.