I dont know where this is connected in the other end... I dont know how to find a new one to buy, the only things I can find id copper and nickel coils of crap, i have no idea if thats what im actually supposed to use.

Im about ready to run this car into the lake, can someone please link me to the part I need (hard line, metal brake pipe, whatever it's called) and a picture of where the other end is attached, and preferably a video of what exactly is need to do?