Thankyou again for your reply.
I guess the plot thickens. I assume as you do that my grandfather was in the forced labour camp until the end of the war. I guess what I would like to find out next is how he ended up leaving a forced labour camp in Austria and ended up joining the military in Italy. I wonder how he got to Italy.
Last Friday I met my grandfathers sister in Belgium whom I'd never met before. She told me that my grandfather did run away to join the army but he wasn't old enough so his father chased him to the train station to stop him where my grandfather hid under a table from him and was not found so he still managed to run away. I guess it must be at some point on this trip that he was caught by the germans and taken to Austria.
Hopefully I will be able to find out more as time goes on.