Drill a hole of the appropriate diameter and depth.

Using the LSM-P centring marker, mark the fixing point in the wood.

Using a drill suitable for wood, drill a hole of the correct diameter and depth at the marked point in the bottom layer of the tread.

Place the connector part with the expansion element in the concrete substrate, then tighten with a screw until the connector is anchored.

Apply a small amount of glue to the previously prepared hole in the bottom of the tread.

Align the step with the hole with glue to the anchor anchored in the concrete. Press the step until the anchor is fully anchored in the wood.