Hi....can anyone tell me where the operator presence switches are on this thing? It is a 1991 265 with 17Kaw. The only one I have found is under the seat. There are one or 2 more associated with the brake pedal and or Pto switch. My mower dies unless I press the brake pedal in whether PTO is engaged or not. When released it dies. Need to jump to test switch, but cant find it. Thanks.