Hi fellas. So I am learning more each day on vintage chainsaw repair but I am still faced with things I have no idea about. I have a remington 660 and 754 that need the whole assembly as shown in the pic. I can buy a used assembly and was wondering if it's just as easy as remove the old assembly and install the donor assembly. Any suggestions would be greatly appreciated. And where in the heck do all those wires go? Thanks!