That hose under the air intake tube. That's when I first bypassed it and it has the the barbed fitting in the middle with 2 clamps on it. Since then I have ran 1 single hose from rad to the point because I didn't like that clamps being so close to something that spins while engine is on. Where the hose connects on the right side is where you need to disconnect while filling rad. Only do TB bypass if you live where it doesn't snow a lot.