The ornamental design for a trailerwiringconnector, as shown and described.
FIG. 1 is a top perspective view of a trailer wiring connector showing my invention;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a side elevational view thereof;
FIG. 5 is another side elevational view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a rear elevational view thereof; and,
FIG. 8 is a front elevational view thereof.
In the drawing views, the broken lines represent unclaimed portions of the trailer wiring connector and form no part of the claimed design. The dash-dot line represents a boundary of the claimed design.