The configuration spaces include configurations where one or more B-atom unit vectors are coincident. These "fusion" configurations pose a challenge for annotating the edges of directed graph representations of the space. Whilst the character tables for chemically important symmetry point groups are fully established along with how to assign symmetries to vibrational modes, it is not immediately apparent how to assign symmetries to "fusion" configurations. To help demonstrate the gross features of the configuration spaces, colour "heat maps" are generated by scoring a configuration {𝐛 1 , … , 𝐛 𝑛 } using an "error-function-flattened version of Coulomb's law":