The interior of the shield generator in Lothal City Imperial HQ is inspired by the power corridor in the Endor bunker seen in Star Wars: Episode VI - Return of the Jedi (1983).
The working title for "Family Reunion and Farewell" was "The Light of Lothal", parts one and two.
The Aurebesh text visible on the schematics in the Imperial control room translates to "Code structures, Hangar back open, Reactor optimal, Hull integrity 28" on the left side of the screen and "All corridors open, Barracks capacity 88, Control room breach" on the right side.
Zeb says his team is headed towards "Sector GL-44" GL is the initials of Star Wars creator George Lucas and 44 us the year he was born (1944).