The ornamental design for an integrated jackplate, as shown and described.
FIG. 1 is a front elevational view of the integrated jack plate showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is the right side elevational view, with the left side elevational view being a mirror image thereof;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the integrated jack plate and form no part of the claimed design.