The ornamental design for bike trailer connector, as shown and described.
FIG. 1 is a perspective view of a bike trailer connector showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a front elevational view of the bike trailer connector of FIG. 1 shown in a position of use with an unclaimed bike trailer.
The broken lines illustrating holes, nuts, and bolts in the figures depict portions of the bike trailer connector that form no part of the claimed design. The remaining broken lines in FIG. 8 illustrate environmental matter that forms no part of the claimed design.