Bundled cable connectors have many small wires leading into them, often wrapped in a sleeve. They may not have anywhere to push with a spudger or a spot to grip with tweezers. Pulling on the cables themselves might be the only option.

This should be a last resort if the sliding connector and JST connector disconnection methods didn't work.

Grip all the cables at once as close to the connector as possible and pull the connector slowly and steadily out of its socket.

Pull evenly on the full width of the cables so no individual wires are strained.

To reconnect, align the connector and use a spudger or clean fingernail to push the connector head fully into the socket.