FountainFEVER 27

Thanks for your help Guys
sorry for my english i came from EU... what happened is when i was cruising the wire from the N fell off when i pulled the throttle back all of a sudden the engine ruined the plugs and started running rich... Could this wire caused the problem to the engine if no what could this be? 540 carb engine holley 850cfm Msd distributor with msd coil an rev limiter box...

thanks for your help