I just did mine mate, you don't need to take the top cover off! i know i thought that

Just pull the hazard light off, just pull up, then push the plastic cover up gently and wiggle the stalk, it will come out!

Also i am not sure on an 6v but there are two sets of wire pluds each side so four in total! one is behind the other, once these are off it should come out!
good luck