Returning to doors, the Pax entry doors were nominally the doors (fwd and aft) on the port side. The Stbd side doors were smaller and, in Dan Air service were used as catering doors as they opened at the galleys. The rear door on the Stbd side also gave access to the Dome Freight area, which, in modern terminology would be a bulk cargo hold. It was a small area between the aft galley and the aft pressure bulkhead.
That Museum of Flight restoration is beautiful, I've never seen a Comet in that condition !