Vector point diagram for the catalogue for the Quintuplet field. The quality cuts of Hosek et al. (2022) have been applied to include only high-quality proper motions in this figure. Shown are the number of sources per proper motion bin, considering the velocities parallel and perpendicular to the Galactic Plane, μ_b and μ_lcos(b), respectively. The arrow points to the position of the Quintuplet cluster in proper motion space. The orange ellipse indicates our selection criterion for nuclear stellar disc members.