Left: VLA L-band image depicting regions used for flux density extraction and RM-synthesis and QU-fitting. Blue regions show the relic subregions where the average fractional polarization was extracted. The fractional polarization at R3 in Table 2 is obtained by excluding the contribution from the NAT. Red boxes where flux densities and Faraday dispersion functions were extracted for QU-fitting and RM-synthesis, respectively. Each red box has a width of 5″, corresponding to a physical size of 32 kpc. Right: fractional polarization profiles across the relic extracted from the rectangular regions, depicted in the inset, of width 2″. There is a hint that the fractional polarization decreases in the downstream regions (i.e., shown with arrows).