which one do you tap off of for a/f gauge to work? Does it matter? Both sensors are in the exhaust mani. Thanks in advance.

 

the one closer to the engine

 

they are both right next to each other on the exhaust manifold. That why i was wondering if it matters which one you tap into. i tapped into one of them and i get a lazy signal( lights moves really slow). Is this the way its suppose to be?