Hello Wolf_Tm,
It seems you bought a EGT sensor with EGT amplifier, the latter is not required when using the EGT sensor with the round, it has an internal EGT amplifier circuit.
To get going fast, remove the amplifier from the EGT sensor and wrap the wires together (white to white / green to green) and apply some shrink wrap to protect them.
If you would like to easily disconnect later applying a thermocouple connector pair is recommended.
Best regards, Dave