leigh d j

I had work done at a garage which involved taking the inlet manifold off. I have the car back and there's a 2 pin plug to the right of the manifold which is to.an oxygen sensor. There's also a vacuum hose loose which goes on the air box somewhere. Does anyone know where the 2 pin plug goes as the garage were terrible and I don't want yo take it back there. Its an s3 2016 model. Thanks Leigh