The ornamental design for a garagedoorsecurityplateassembly, as shown and described.
FIG. 1 is a front elevational view of a garage door security plate assembly showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a rear perspective view thereof;
FIG. 8 is a perspective view thereof, shown in environmental use; and,
FIG. 9 is a rear elevational view thereof, with mounting bracket located in an alternate location.
The broken lines in FIG. 8 illustrate environment while other broken lines in the drawings indicate fixtures. None of the broken lines form part of the claimed design.