how to open an elite battery 575.21 to fill out

Hello everyone, I have a small problem and I do not know how to open an elite battery 575.21 to be able to check and fill levels. Can anyone help me?
Thanks anticipated

You will see, if it is with maintenance, it will have about 6 or 7 circles with a + in the center, open them all and cast distilled water.

If you do not have those circles, it is without maintenance, and you cannot '' recharge '' you would have to buy another new one.

What he is asking is how the filling caps of that battery are accessed.
The fact that a battery is low maintenance or maintenance lies in the fact that the lead is added calcium and other materials with the purpose that it does not evaporate so much water and lasts longer, but to any battery it is possible to add it distilled water in order to compensate for the evaporation even if it is very small.

Good, I appreciate the answers. This battery does not have the plugs of the visible filling blocks. It has a kind of lid along all the battery with two side holes. But try to disassemble it with two crat by is impossible. With what after what you have commented, it is still maintenance and cannot be filled. I thought that all the batteries could fill.

Thanks anyway for help.