1,2 5,6 are you line voltage in to the ballasts.
The list on the junction box tells you exactly what everything is.
Please note my info is only based on what you are showing me I am not there to trace the cabling back for you. But it looks like the 1,2 5,6 are the supply line to the ballasts. This is then not required as you will be connecting the brown blue and earths to the EVG card to obtain switchable supply
1,2 goes to ballast supply 1 and 5,6 to ballast supply 2 along with the green earths.