[x-type] Installation of rear exhaust boxes on 3.0L V6 AWD

Hello Folks,
Just looking at changing out the rear exhaust boxes on
my 2001 3.0L V6 AWD and I cant see how to install the new box assy
which comes as one unit with the 2 boxes siamesed into 1 outlet
running forward. Has anyone done this of late who can proffer some
good advice (apart from dont bother!).
Charlie XJS
cleveland, United Kingdom
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