Filling maintenance free battery with distilled water

This video is about Filling a maintenance free battery with distilled water. The battery I use is completely sealed and has no hidden covers .
There are small vent holes next to teh sealed cell caps. In time , the battery acid level diminishes and the plates are exposed. This will lead to faster degradation of the battery. The indicator on the battery was showing that the battery needed replacement or frequent charging. After the distilled water refilling all seems to be fine now.

If you want to just drill holes to get to the filler sections here are the measurements :
From the top blue front edge measure 18 mm back .
From
Left blue plastic edge Measure 13 mm, 51 mm and 87 mm
From
Right side blue plastic edge measure same 13 mm, 51 mm and 87 mm and these all should line up with the filler holes .