Turbo oil feed banjo?

[Jcerb]

Good evening all, I have noticed I have a weep from the swivel joint part of the anodised blue hose fitting. To tighten it there is no access unless you remove the big red banjo which connects to the leaking swivel joined part first. Does anyone know the thread/part I need? Luckily I found this as I have the diffuser off at the moment. Any help would be much appreciated. Joe