[1985 CCX]

Guys

Couple easy ones.....

1) Where does one add windshield fluid?
2) What is the button for on the right of the heater dial used for?
3) Has anyone wrapped the exhaust under the rear fender with heat wrap typically used for a starter?
4) To add a 16 steering wheel, is it easy thing to do with the correct boss? Guessing its an easy change....