Positioning.MDEK1001

Hi,
I am working with MDEK1001 modules. I have 3 anchors and 1 tag. I have set the x,y and z coordinates by the Bluetooth Modules using MDEk1001 and get my estimation and ranges via UART interface. However, I would like to customize my own code on the c interface. But I do not know how to set my anchors position on the code and then get the position. Anyone can help me in coding?

Thanks