The wings on a C-310 come off at the fuselage, not outboard of the engines. Lots of work on a multi-engine to pull the wings. Easy on single engine, done all the time to ship them.
I was thinking more of those WWII pictures of twin engine planes on freighters going to Europe. Would have thought the 310 would be the same. So you’re saying that the wing is integral with the engine? No disconnect points/attachment to the engine nacelle?