How to Create Custom Attribute to <img> marker on google map

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How to add a custom Attribute (like<img id="customId">) to tag that is generated by google maps as a Marker Icon? Any help would be appreciated.

<div class="gmnoprint" title="" style="width: 15px; height: 15px; overflow: hidden; position: absolute; opacity: 0.01; cursor: pointer; left: 505px; top: 235px; z-index: 250;">
<img src="test.png" draggable="false" style="position: absolute; left: 0px; top: 0px; -webkit-user-select: none; width: 15px; height: 15px; border: 0px; padding: 0px; margin: 0px; max-width: none;">
</div>