Water tanks location

[Udi]

Hi. I own a Hunter 45DS model 2009/10. the boat have 3 water tanks.
I am experiencing some problems with the quantity display that isn't accurate, and I want to check the sensors.
I know the location of the forward tank which is located at the bow, and the location of other tank which is located under the floor near the sink at the galley.
The problem: I don't find the third one and how to reach it in order to take out the sensor for inspection.
I'll appreciate any help.
thank you.

 

[jssailem]

I am not a Hunter owner. I would expect that the water is located under the sole of the main cabin. The manual talks about 3 tanks. Here is the image with the locations found in the manual. If a previous owner modified the boat, they may have been moved or removed.

Source: https://sbo.sailboatowners.com/downloads/Hunter_45DS_980957.pdf