Normally, I would create the fuselage and then work in the attachment point for the wing. This is as the wing is very smoothly blended into the general body of the plane on most aircraft. Only panel lines tell you where the join is. In that case, I’d build the fuselage up to include the profile of the wing where it joins the body, then build the wing out from that point. Again, that is with most aircraft.
But with the A400M, the wing even looks like it has been bolted on afterwards as an afterthought. I would be tempted, in this instance, to create the body and wings as separate assemblies and join them.
Here is an example of what I’m talking about.
Look at the very defined join in the wing and fuselage. It looks like two different objects bolted together.