Schematic setup of the joint polarization fit among all four VLA epochs. The first, third, and final epochs are affected only by the single GC Faraday screen (ϕ_GC) whereas one of the two components in the second epoch has an additional secondary Faraday screen (ϕ_local). Intrinsic polarization angles for each day and component are denoted in red, while the measured polarization angles are in blue. Intermediate (unobserved) polarization angles are shown in yellow and magenta. “+” denotes that the sum of the two components gave the observed linear polarization on 2025 April 6. Physical scales are not accurately represented.