I'm thinking it may be a connector - just made another discovery, if i drop the bank of three drop targets - the Thunder light should come on - it doesn't...BUT... when i hit another stationary target the Thunder light illuminates!!!

Also there is another switch that when hit, turns on the other lights related to the bank of 5 drop targets!!

I just have to work out what will get the player illumination to work now.

I'm assuming the 1st place to look will be all the connectors at the drop targets and these two other seemingly related stationary targets??