I'm replacing the white rubber lamp holder in my early Series 2 rear light with a Casa one (the one I have was bodged to take two festoon lamps using a different lampholder years ago). The new rubber lamp holder has three festoon lamp holders, but (i) which ones are for the rear lamp and the brake light, and (ii) what wattage of lamp should go in each lampholder

I'm keeping the 12V Indian ac electronic kit I've run for years. Hope this makes sense. Thanks in advance!
