REGULATOR PRO Ducati Black plug.
GAS GAS Ducati Energia AC to DC rectifier regulator unit.
GasGas Part number MT300534009 (black socket version)
This is also a replacement for existing part number MT300334009 (blue socket version) for the 2004 GasGas 250, 280 & 300, it requires the connector to be replaced.
It is lmost the same as 2004 model MT300334009 that has the squarer blue plug. Body is the same shape - alloy heat sink with fins.