only thing i know is on drivers side is the alternator
theres a thick white wire from back of alternator to drivers gaurd then around front of radiator then to battery this wire charges the battery
best thing to do is get an led test light
check for 12v to the injectors just unplug one injector plug and check for 12v should be on the Black/Orange
check for 12v at the coils black/orange wire
how do u know its got fuel
check for 12v at fuel pump and also check fuel pressure in the past i have found just by taking return of and seeing abit of fuel come out is not good enough
maybe the smash repair guys fried the ecu when welding
if u have power to ecu/coil/injectors then the thing should start