Heat sensors on a kad42

[Waters reach]

Hi
I have the Volvo Penta kad42 engines in my Fairline Targa 38 1995 boat. Can anyone tell me where the 2 heat sensors are please. Ive located the heat sensor for the gauge, which is located on the side of the thermastat housing, but for the life of me I cannot find the heat sensor for the warning alarm . Anyone's help would be gratefully appreciated
Ron

 

[volvopaul]

Hi
I have the Volvo Penta kad42 engines in my Fairline Targa 38 1995 boat. Can anyone tell me where the 2 heat sensors are please. Ive located the heat sensor for the gauge, which is located on the side of the thermastat housing, but for the life of me I cannot find the heat sensor for the warning alarm . Anyone's help would be gratefully appreciated
Ron

Underside of exhaust manifold

 

[Waters reach]

Do i need to take the compressor off to get to it as I cannot see anything there not even a wire

 

[Waters reach]

Sorry I put the year of the boat wrong , it's actually 2005