Assign ID as image shows on right.

        <g id="level_1_beacon" transform="matrix(0.32587,0,0,0.451276,442.586,750.59)">
            <rect x="22.624" y="105.286" width="167.947" height="41.62" style="fill:rgb(192,192,192);fill-opacity:0.75;"/>
        </g>