Some images upside down as filmed in mirror. The turbo oil return pipe has no paper gasket - only the O ring. It must be flush to the turbo, which is not as easy as it sounds. When you insert by hand you can’t really push squarely on the fitting, so it tends to only push the front in, but it is not very obvious.
After it is situated and the bolt inserted, then connect the lower section of the pipe. The heat shields and downpipe must be removed to do this job.