Set the terminal icon on MacOS

• Navigate to Applications
• Find the terminal app of your choice, right click and choose Get Info
• Drag and drop one of the .icns icons over the icon on the top right of the info window

Set the terminal icon on Windows

• Right-click the app, and choose Properties
• On the General tab, click the Browse button next to Icon Path
• Browse to the of the icons location to select the icon
• After you've selected the icon, click Open. Click OK to apply