In this picture — taken on May 23, 2019, in the Spacecraft Assembly Facility's High Bay 1 clean room at the Jet Propulsion Laboratory in Pasadena, California — engineers re-install the cover to the remote sensing mast (RSM) head after integration of two Mastcam-Z high-definition cameras that will go on the Mars 2020 rover. https://photojournal.jpl.nasa.gov/catalog/PIA23266
Album Mars_2020_Perseverance