X-METAL 44988 Instrucciones De Montaje página 30

ENGLISH
Fixing the posts - method 2 (creation of concrete pads)
You need prepare wooden boards A, B and callipers C by yourself.
Put two wood A (140×6cm) on top of wood B, then put W05-2 on
wood A (S01 already pre-installed on W05-2), S01 stay above of
wood A, see picture B. Use callipers C fix wood A and W05,
adjust height of wood B to let bottom of W05-2 at same level of the
ground.
30