Influence of natal SN kicks on the post-SN binary configuration. The scatter plots illustrate the results of a Monte-Carlo simulation for the post-SN distribution of orbital configurations, assuming various initial configurations. Each colour represents a given pre-SN orbit, receiving a kick of fixed amplitude. The kick angles are drawn from uniform distributions (see text and Tauris et al. 2017). Blue, orange, and green points represent the Channel A example discussed in the main text when the second LMG BH is formed. Red points show simulations for the Channel A progenitor discussed in Zevin et al. (2020). Blue and red vertical lines indicate the initial orbital separations of the afforementioned systems. Binaries to the left of the black-dotted line merge within a Hubble time.