MTPLM upgrade

I am about to buy a Swift Elegance 565 caravan, 2021 model.  The weight plate beside the entrance door gives the MTPLM as 1701kg and I would like to uprate this to the allowed upper MTPLM of 1750kg.  The dealer says this may not be necessary as there is a separate plate inside the front locker which already shows the maximum weight figure of 1750kg.

In practice, I expect the laden weight of the van when touring to be a little over 1700kg, hence the desire to uprate, but now I'm confused as to which plate would be referred to should I ever be stopped for a weight check.  Appreciate any advice.