the control unit is internal
but you can check connector ,I make sure no oil in the connector leaking from inside to it ,i sent you pictures .
EGS Control Unit: The EGS on the 6-HP gearbox is fitted as part of the gearbox and no longer as a separate control unit in the Electronics Box. It evaluates the sensors electronically and directly activates the hydraulic unit. A temperature sensor of the EGS processor additionally monitors the gearbox temperature
just double check you have that connector , i want make sure it doesn't change in the u.s. here than u.k
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