Example of mock radio (top two rows) and X-ray (bottom row) observations of two bridges connected to a ∼2 × 10¹⁴ M_⊙ galaxy cluster in our simulation. The red circles denote the R₁₀₀ of the halos connected by bridges with width 5′ (red rectangles), as in Sect. 3.3.3. In all panels, we give in colours the signal and noise of each mock observation, convolved for the resolution of each observation, while the blue contours are drawn with a logarithmic spacing, starting from 3 S/N of each observation (see text for explanations).