If you haven't got quick release couplings on the fuel pipes I'd take the opportunity to fit some now. You'll need 2 couplings and a meter of 8mm hose plus some clips. I can get my tank off in about 2 minutes from turning the engine off. 2 fuel pipes, 2 overflow pipes, one electrical connector and a bolt.
btw, make sure you've got somewhere to put it when it's off.
To answer your question directly, you'll struggle to route wiring with the tank only partially removed. Not impossible but why struggle?