Plug disconnected front left of the engine bay electricals.

[ManWithNoVan]

Popped open the engine bay fuse box today to find a plug disconnected. Popped it back in but has anyone any idea what it is? There was a certain feature mapped out, but i don't want to AD-vertise this out of the BLUE. Would it be related to that and maybe i should unplug again?

Disconnected plug circled

Any help appreciated.

2015 Multispace (formerly) Blue HDI 1.6

[ItsGreen]

Not sure. Just bear in mind though that if you leave a tank of the dreaded substance for too long without using it, it will crystallise.