Hmm ok so the top one is the one to splice. I got confused cause the top one on the engine the actual rubber tube is flowing under the one in the bottom. Like for instance imagine a big X. The lower left point is the lower hose and the upper left point of the X is the hose that is connected just above it. The top one flows down ( \ ) and the lower ones flows up ( / ).
Okay here is a picture. Unlike the picture you showed me, my heater tubes flow like this
Top one somehow goes under the bottom one and bottom one goes over the top one. Anyways, slice the one I circled right?
