Need to know where the test port is on Farmall 110c for 3 point hitch

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I am putting an accumulator on my Farmall 110c for the 3 point hitch. I believe the port is right under the cab but no one at my dealership can tell me for sure. I have also heard it may mess with my draft control but will worry about that more when I figure out where to hook it in. I believe they would call this the pressure test port. I think all CaseIH Farmall C tractors are probably in the same spot but not positive. Anyone every install one on these tractors?