Fits to Lyα (top), Lyβ (middle), and Lyγ (bottom) H i absorptions in the BG (left) and FG (right) spectra. Dashed purple, blue, and red lines mark the log N(H i) > 18.0 components in regions A, B, and C, while dash-dotted purple, blue, and red lines indicate the weaker components within the respective regions. Dash-dotted blue-gray lines signal low column density components between the three main regions that are also part of the absorption structure. Dotted gray lines in the BG-Lyα panel indicate blended components from Si iiλλ1190, 1193 absorptions associated with a z ≃ 2.75 DLA. Zero velocity is relative to the BG-C system redshift, z = 2.6894, and the 1-σ error on the flux is shown in magenta.