What’s this under driver seat 2012 transit

[NellieMcDee]

Hi there, while converting my Mk7 2012 transit I found a port with a red plastic cover behind the battery casing under drivers seat. It looks like a customer connection point but I don’t think 2012 ford transits have them. I presume as it’s red it’s a live from the battery but it’s situated on the negative side of the battery. Does anybody know what it is? I’m out camping and can’t upload photos from my phone to this platform.