I would check with TeamMuch More North America for clarity.
I know the units coming in for sale in NA will come with the proper plug. Did you buy yours from the internet?
If so I would try to get the proper plug from the shop where you bought it or contact the above for proper instructions.
Awesomatix-Roche-Reedy-Sweeps Racing- ORCA-Sanwa-RCTagz-Avid
WCICS- Competition Director