If you use the pick tel has put up as a guide , look at the end caps if they are wired in blue and brown as i think they are then it could get confusing as you are going to have to mix the colours , ill try and explain the 2 tube end caps connect each of the browns to the two connectors of the terminal block with the starter connected , thats the little round cylinder in the holder then slevee one of the blues with brown sleeve so it becomes a live and connect it to one of the ballast terminals of the terminal block then connect the blue to one of the free terminals this is where the neutral of the mains lead connects then connect the live of the mains lead to the remaining ballast terminal , if the mains cable has an earth, green and yellow terminal this should be connected to the ballast casing , hope that helps look at it in conjunction with tels picture