I needed a grommet to protect the wires without the hassle of having the connecting lug in the way because it was too large for the grommet so this is what I came up with. The grommet opens up when the box opens. The grommet has a split so you can separate it after printing and a drop of super glue holds each half in place. I needed to drill a hole between the lid and the bottom of the case with the lid closed for proper spacing in order to install each half. The OpenSCAD file is parametric so you can design your own but you will need to adjust the z offset to get the spacing correct.