Globular clusters with confirmed radial velocities (coloured dots) plotted over the surface density map of photometric GC candidates from the FDS (Cantiello et al. 2020). Top panel: full GC radial velocity sample. Middle panel: radial velocity distribution of red GCs. The black line shows the rotation axis of the red GCs at PA = 70°, measured north to east. Major galaxies are labelled in green. Bottom panel: same for blue GCs. The density scale plotted at the bottom represents the number of GCs from the photometric sample per square arcminute.