It should work without any changes. The contacts setup of both cameras is compatible.
If there is no power the fuse may burnt or cabeling from contact blades to gimbal board is defect.
You will not have tasks anymore for the Typhoon H without the CGO3+. Reason is that there is no more the serial connection to the camera availbale . Only +, - and PWM. No Tx/Rx used in CGO3.
br HE