Switched the engine between frames and won,t start
 

Hello

Got a XT660X 2004 got got a damage frame and replaced it with a good now. Tested the engine before the switch and now it won,t start. When I connect the battery the clock in the display shows up but when I turn the key it just click in the start relay. Also when I switch the killer button to off the clock not shown any more and put the button on it comes back.

Tried to check the connectors and all seems ok and have also check I have no gear in and the sidestand switch seems ok. Can,t see that the anti theft blinks in the display who is showed like a key.

Would be greatful for some advise where to start.

EDIT: Found the fail. Forgot the extra ground cable.