Help for 16 pins terminal creation

One layer needs to be embedded inside the other; copper0 inside copper1 or vice verse...

 <g id="copper1" transform="translate(57.778 51.111)">
     <g id="copper0" stroke="#ffbf00" fill="none">
         <rect id="rect3387" height="62" width="62" y="19" x="10" stroke-width="20"/>
         <circle id="connector0pin" r="27.5" cy="50" cx="42" stroke-width="20"/>
         <circle id="connector1pin" r="27.5" cy="50" cx="542.22" stroke-width="20"/>
     </g>
 </g>