tm p90 again

[cptnpanda]

right i got this gun very recently on a swap from this forum and since day one there has been problem the gun now fires no problems there but within about 3 seconds of the battery is connected theese parts get hot the tamiya connectors, all the wires got hot, the connecting pads where the trigger connects the circit was sparking i really need some hepl as the swapper is saying he will pay for any parts needed within reason but obviously if the gun need complete rewire or something theres going to be a very big argement ect ect please help again this is a p90 with the v6 gearbox