Wings and accessory
The Constellation was designed to be the airliner with the highest speed, altitude and range of that time. To achieve all this, the Lockheed engineers had to realise some unusual ideas. The wings for example were taken from the P-38 fighter and enlarged. That means the Connie is an airliner with the characteristics of an fighter plane. The rudders also remember of those on the P-38.
Lockheed P-38
A small list of the parts in and around the wings...

1 - Hydraulic aileron booster 2 - Tank 3A fuel dump chute 3 - Primary heat exchanger (Air conditioning) 4 - Refrigerator unit 5 - Secondary heat exchanger 6 - Center section fuel tank (Nr.5) 7 - Cargo compartment door 8 - Rudder and elevator booster 9 - Cabin heater 10 - Fuel tanks 11 - Hydraulic aileron booster 12 - Copilots fluxgate compass transmitter 13 - Pilots fluxgate compass transmitter 14 -Fuel dump chute tank 2A 15 - Fire seal 16 - Fire wall 17 - Cabin Supercharger 18 - Landing light 19 - Oil cooler scoop 20 - Cabin Supercharger 21 - Deicing system (On leading edge of all wings)

And that's the way to refuel....

The tanks are big enough to hold more than 24000 liters of 100 octane aircraft gasoline. Since there are no more big airplanes with piston engines, there are no more big tank trucks with gasoline on the airports. For the small private airplanes small tankers are good enough.

That's the reason why we have to refuel with the same kind of filler pistol as used for small airplanes or cars. So it can happen that one spends a long time on the wing, holding the hose and the pistol. One good advice... take gloves, the fuel is icecold.

The tank job on New Foundland during the ferry flight to Switzerland was even more complicated. Because of the huge amount of fuel needed for the Atlantic crossing, the tank truck had to go three times to refuel.... unfortunately the fuel depot was 300km away from the airport. The poor guy had to drive the whole weekend long to get all the fuel we needed. A story he will certainly tell to his grandchildren.