Suddenly seeing this i remembered this thread in the worskshop
![Thumbs Up [thumbsup] [thumbsup]](https://www.theautomotiveindia.com/forums/images/smilies/Thumbs%20Up.png)
Found one in workshop and clicked pics to demonstrate.
Picture one
exact sample
picture two
use help of screw driver if the bat cover is old or greasy as in this
Picture three
open and ready to fill
Picture four
life time maintenance free bat - this one was in the ikon