A few years back there was a guy from raychem who came onto the forum and posted some responses to the questions I had around mil-spec wiring in F1, we could see in the pictures that the connectors were of this type.
It looks like RBRacing use this Raychem spec55pc wire and cable installation system (motorsport mil-spec).
That is a really good read and is a lot more easily digested than the raychem documentation
The solution given for the Wicked Wicking effect works as the wire loom is constructed away from the environment where the contaminant exists. Using the reychem mil-spec connect system this gives guaranteed environmental sealing, withstanding vibration and age. This same stuff is in F1
The wicking issue could happen in F1 because the terminals are disconnected and reconnected on site, as we know the steering wheel comes off... and there is no way around contaminants causing problems here... just due care and attention.