In Season 1, Episode 9, titled "Nobody's Listening!" , the "piece" refers to the heavy mechanical components that prisoners on Narkina 5 are forced to assemble. The Assembly Line
Prisoners work in teams (such as Cassian’s Table 5) to construct complex, star-shaped metal pieces. These pieces are part of a larger industrial output that remains mysterious to the inmates throughout their imprisonment. Andor s01e09
: Mon Mothma struggles to hide a 400,000-credit hole in her accounts used to fund the rebellion, leading her to consider a dangerous deal with a Chandrilan "thug". In Season 1, Episode 9, titled "Nobody's Listening