55.2-59 Wiper Transmission gasket

[57FleetsideC4]

Hi again everyone, I have another question and will probably have more as I put this 57 pickup back together. I bought this as a started project and it was a bare shell. I am putting the wiper motor and transmissions in soon and there is a gasket and am not sure how it goes in. Should I put it on the transmission and have it between the transmission and cowl on the inside or should it be between the bezel and cowl on the outside? I am trying to avoid any leaks so need the correct placement. Thank You Steve