Hi, this is my first contribution to the community and I came with a simple tutorial on how to add a minimap to your custom map thanks to Krysik who gave me alot of information about.
Please see attached pdf file or get it from this link https://drive.google.com/file/d/1VpQnQbVZGaR3ry8n-wUUTtUfTS_DBTYh/view
Custom Minimap Instructions.pdf