var cellImage = document.getElementById("circle").src;
var rowImage = "./css/images/quarter1.png";
var colImage = document.getElementById("logo").src;
sheet.getCell(3, 3).backgroundImage(cellImage);
sheet.getCell(1, -1).backgroundImage(rowImage);
sheet.getCell(-1, 1).backgroundImage(colImage);
...
<img src="./css/images/box3.png" id="logo"/>
<img src="./css/images/greencircle.png" id="circle"/>