Mercedes antos questions

Does anyone on here drive an ANTOS 2530 and if so have you fitted an air duster into it ■■ Where do you connect it to ? ( Without butchering seat air pipe ) I know it needs a series 21 adaptor but what size thread do i need to attach it to the air outlet under the front bonnet ?
I do know ACTROS has an in cab fitting on storage box behind drivers seat i was just wondering if the ANTOS has this playing hiding seek with me in mine :thinking::grinning::smile::flushed: