Where are all the safety switches on Craftsman lawn tractor?

Where are all the safety switches on Craftsman lawn tractor?

After reading forum answers on why the mower dies when blades are engaged or brake is let off I need to check safety switches but I don't know where they are on this mower. Under the seat yes but where are the others? Craftsman 18.5 42" 917.273642 lawn tractor THANK YOU IN ADVANCE :)