I can hereby confirm, that my Time Capsule (A1470) managed to handle the 8TB drive, which I put into it yesterday. 8TB WD RED is now in place, silently and happily backing up all the MacBooks we have in our family. On the practical side, everything went well, no issue with cutting the rubber bumpers.

Connectors 2 and 3 (and also the reset connector) can be very easily detached with a needle! Yes, ordinary, usual, common needle! Never try to detach the connectors by pulling the wires or transfer the power via the wires. Not working. Damage imminent. Put the needle tip just behind the wires - try to find that tiny micro slit betwen the connector head and the board - and slightly push out (use the needle like a lever). The connectors pop out as a charm.