Customize, change icon Traccar Client

I successfully changed the icons for all resolutions but I can not find/change graphics for the icon from add widget menu. After installing the application on android smartphone icon (in widget menu) that we use to create sos shortcut is still old traccar graphic.

All the icons are standard Android drawable resources.

solved,
after a few entrances and exits from the widget menu the icon has changed for mine.
Maybe it happened due to the installation of two clients together, the original Traccar Client and my after branding.

Hi Piotr.

You can tell me how to change the icons by default.

Thank you.