What was found
(CAN) UPON DESCENT INTO MUSKOKA CAPTAIN NOTICED SMOKE BY HIS L/H KNEE, AT FIRST MINOR, THEN INTENSIFIED. CAPTAIN DECLARED AN EMERGENCY AND INITIATED AN EMERGENCY DESCENT AND LANDING AT MUSKOKA. PASSENGERS AND CREW DEPARTED THE AIRCRAFT WITH NO INJURIES. MAINTENANCE PERSONEL DISASSEMBLED COCKPIT PILOTS SIDE FOR INVESTIGATION OF SMOKE IN THE COCKPIT. MAINTENANCE PERSONEL FOUND SOME OVERHEATED/ BURNED WIRING AT THE PC038 CONNECTOR TO THE EMERGENCY LIGHTING BATTERY. THE BATTERY WAS SENT TO CESSNA FOR EVALUATION AND THEY REPORTED THAT ALTHOUGH THERE WERE SOME CHAFED WIRES INSIDE THE BATTERY PACK, THEY WERE NOT THE SOURCE OF ANY SMOKE.