The ornamental design for a panel with integralconnectors, as shown and described.
FIG. 1 is a front, right perspective view of a panel with integral connectors showing my new design; and,
FIG. 2 is a front view thereof.
The left side view and the right side view are the same. The rear view is a mirror image of the front view. A cross-section of panel with integral connectors is the same from the front to the rear.