Multi-Input Transformer Gallery Icon Difference

Could you make the icons for transformers that have more than one input have a visible difference to those with only one (a small number, different colour or input lines on the left).

Often times I don't really know what to search for to achieve a goal, but I will know that I need two inputs not just one, so if I can visibly see the difference when searching for a transformer it will make narrowing it down much easier.