Providing you with maximum security for site mains electricity in your caravan or campervan, this consumer unit has a 25 Amp Residual Circuit Breaker and has a 10 amp double pole MCB's (Miniature Circuit Breakers)
I’m the same answer as big Aldo as if we advised you and something went wrong then guess were the finger would be pointed. You should get a diagram on how to do it from the internet as it’s straight forward enough.
I can only assume that he says that because you only have 1 MCB! And so it could possibly be an option.
But think of a more usual setup 1 x RCD plus perhaps 4 x MCB or 2 x RCD and perhaps 10 MCB's
I would suggest that my original comment is the definitive one
You will NEVER see a domestic consumer unit wired up other than power into the RCD and then to the MCB's
There is only 1 way that is correct.
I've just found this on the 12volt planet, this is for my consumer unit. This makes sense, if you look at my initial picture my bus bar/links are fitted at the top, if I fit them to the bottom then everything will be as everyone advises. If this is right I wonder how my links were fitted incorrectly.
I don't expect that your links are wrong. Just that you have a different unit to the one described.
It looks, from your photo, that from left to right across the bottom.
Live out; Neutral out; Live in; neutral in.