Nanoleaf Mounting Template for Mini Triangles. No measuring and marking needed.

HowTo:

1. mount your first triangle with a connector attached
2. attach a wall mount with a round spacer to the mounting template
3. attach the mounting template to the connector 
4. secure the wall mount with nails or screws (tested with screws on a dry wall)
5. replace the helper with a triangle that has a connector attached
6. repeat steps 2 to 5 until your layout is finished

The wall mounts are too thin without the adhesive stripes. That's why the round spacers are needed.