The metal lines are transmission lines. Don't worry, as long as the engine is off you will barely loose any. The work off pressure and no engine running no pressure to spray everywhere. this was the biggest issue trying to research when attempting this. I didn't know how much fluid I would lose but seriously , I maybe lost table spoon full. the other two lines are coolant lines, the middle ones goes to the expanision tank the bottom somewhere under the engine. Just remove it from the rad