Removing the Cell Spacing

I am attempting to remove the space between cells of widgets used in pagebuilder, I have two images that I would like to sit up against each other but cannot achieve it.

I have tried this:

.panel-grid-cell {
margin-bottom: 0 !important; /* Adjust the number on this row as desired */
}

But no joy, I am using a theme that allows for styling inside of the widget panel but nothing works there either, I have a css plugin running and cannot get the images touching.

Could anyone please let me know how to resolve this.

thanks