Sadly the Knipextend pliers are not yet available, so i downloaded the STP File and created the models based on the part of one of the upcoming pliers. For attaching the label I would use double sided adhesive tape.

Today Knipex released the new set of pliers utilizing the “Knipextend” features,

they will have the option to attach a label, but also custom Modules.
STP File by Knipex is provided here.: https://insights.knipex.com/3d-druckdaten-knipextend

The Label dimensions are roughly 44 by 9 millimeters. I chose the height of 0.5 mm which is thin, but no issue for a leveled printer. Thinner is of course possible, but that can be customized. (Or you simply print a label using a labelmaker)

I will provide the "KNPX”, an empty label and the customizable (OpenSCAD) File. You can customize it using the Desktop-App or using the "parametric model maker" in MakerWorld/MakerLab.
If you are using the default heights, you can add a “change filament at layer” afterwards.
If text and base are 0.6 mm high each, then please change the color at 0.6 mm.: