95 e300d. Has two windshield washer pumps. The hose that sprays the windshield has two insulated wires imbedded along the length that terminate near where the hose fit into the pump. Where the wires come out of the tubing near the pump, it looks as if the two wires are crimped to form some sort of thermometer or sensor. Is this "sensor" supposed to hang loose or does it belong inside the reservoir? If it belongs inside the reservoir, how does one install it?