91 318is break pad wear sensor.."two" wires to caliper???

New front pads and rotor....looking at the sensor wire setup...one sensor wire(covered by rubber covering) goes from the connector under the hood to the "back" of the Girling caliper....the other wire runs parallel with that wire but is cut and taped off?...what is this second wire for?
I have new sensors on order. Were there different sensor setups for the 318is...some photos show the sensor wire going to the slot in the brake pad itself? Anyone have a phot of how these two wires connect?
New to E30's
Karl

91 318is break pad wear sensor.."two" wires to caliper???