See items 7, 8 and 10. That is where you took the pictures in your wheel arch below the intercooler.
Follow the items along to item 11 and that is your compressor outlet from the turbo.......check that connection. If thats ok and you still suspect the turbo, whip the pipe off and have a look at the compressor of the turbo. You should see some little vanes that should turn feely.
For further info, underneath the car, follow the exhaust pipe up all the way and that connects, via a triangular plate with 3 nuts on it, to the turbine of the turbo. If you suspect the turbo has failed you can also whip that connection off and have a look at the turbine. That way you will have looked at both parts that are likely to have failed.