No A on the stalk for wipers.

Check up front up at the headboard, my headboard has a little half circle cut out which has a small cluster of wires (wrapped in loom) drop out of and plugs into the sensor on the windshield. I imagine if you are supposed to have rain sensing, that cluster of wires is tucked up inside the half circle and you should be able to pull it back down.

I think you have to buy a new windshield though to make them work, because the sensor is built in. But maybe it's something you can just stick on?