I normally use a small junction connector block. So you feed the power in one side, and have two wires coming out the other, to power your cigarette lighter and your boost gauge.
I spoke to Memphis, he'll have our plates finished this weekend, so I'll pick them up off him on Tuesday.
Can people let me know how they would like to collect them. I can leave some at SST or Worksauto for people to collect, or otherwise you'll need to organise a time to grab them off me:D