Adding Distilled Water to OEM Battery -- correct level?

Jordo!

I am surprised to find that what should be unambiguous, nevertheless is not at all clear...

After reviewing the manual, peering down each battery cell with a flashlight, consulting various you tube videos (some literally just show a guy pouring water without much thought into the holes), I'm still not 100% clear on how to tell if it's "topped" off.

As I understand it, the bottom of the top leads should just break the surface of the water. Is this correct? I don't quite follow what I should be looking for beyond that, and it's tough to see.

The illustration in the manual isn't very helpful either...

Anybody on here have some 100% clear, even a big idjit like me can understand it advice (other than "Just replace with a maintenance free one as needed)?

BTW, the battery is currently fine, and showing between 14 and 14.5 volts in normal operation, which is supposed to be perfecto (and some variance is normal).

I just want to understand this stupid little bit of maintenance myself. Got distilled water and a dropper all ready.

It's clearly easy to do once you know what you are looking for... I'm just stupid -- help me to be less stupid!

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