Make PyCharm recognise the Sage python interpreter (where to find Sage Python executable)

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I am using Sage through WSL. I would like PyCharm to recognize my Sage Python interpreter. I was trying to follow the steps in the answer under the question by the name "Make PyCharm recognise the Sage python interpreter". One of the steps is that I have to browse to the python2.7.exe executable under C:\Program Files\SageMath 8.1\runtime\opt\sagemath-8.1\local\bin, but I don't have a SageMath folder under Program Files. I would expect the python executable to be somewhere in \\wsl.localhost\Ubuntu, but I can't find it there. Would someone know where this executable can be found given that I use WSL?