The ornamental design for a hitchplugplate, as shown and described.
FIG. 1 is a top perspective view of a hitch plug plate showing my design;
FIG. 2 is a front plan view thereof;
FIG. 3 is a cross-sectional side elevational view thereof taken along line 3—3 shown in FIG. 2;
FIG. 4 is a side elevational view thereof; the other side being the same as the side shown; and,
FIG. 5 is a rear plan view thereof.
The broken line showing of the letters and numbers in FIG. 1 and the receiver hitch shown in FIGS. 1, 3, 4, and 5 is included for the purpose of illustrating environment and forms no part of the claimed design.