The ornamental design for a modularconnectorwiringsystem, as shown and described.
FIG. 1 is a top, front and right side perspective view of a modular connector wiring system showing our new design;
FIG. 2 is a bottom, front and left side perspective view thereof;
FIG. 3 is a bottom, rear and left side perspective view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a left side elevational view thereof;
FIG. 8 is a front elevation view thereof; and,
FIG. 9 is a rear elevation view thereof.
The broken line depicts internal elements of the modular connector wiring system, shown in FIGS. 8 and 9, is unclaimed subject matter, and forms no part of the claimed design.