Eclipse timing variations (ETVs) for the nominal model (top; see Table 2). All synthetic minima (primary and secondary) are plotted on the x-axis (black), together with the observed minima (green) and their differences on the y-axis (red). In the N-body model these ETVs are small because they are suppressed by the actual motion of the eclipsing binary (Ac1+Ac2) about the centre of mass of all four components. For comparison, a simplified two-body model from Mayer et al. (2022), exhibiting large ETVs, is plotted (bottom; gray), with the light-time effect extracted from our N-body model (olive).