The ornamental design for a poolcueholderinsert, as shown and described.
FIG. 1 is a top perspective view of a pool cue holder insert, showing our new design;
FIG. 2 is a top perspective view thereof;
FIG. 3 is a front elevational view thereof, the rear elevational view, left-side elevational view, and right-side elevational view all being identical thereto;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a bottom perspective view thereof; and,
FIG. 7 is a cross-sectional view thereof, taken along line 7--7 of FIG. 4.
The broken lines showing a pool cue holder and a pool cue in FIG. 1 depict environmental matter and form no part of the claimed design.