200″ × 200″ cutouts of the NIKA2 COSMOS 2 mm map around each cluster candidate. The center of the candidate (red star) shows clear negative signal. Clusters found in the literature are shown as black triangles. For each candidate, we show as white contours the S/N levels in the matched-filtered map where its detection S/N is maximum (see Sect. 3.3). The contours start at ±2σ and are spaced by ±1σ. The maps have been smoothed with a 10″ gaussian kernel for display purposes.