Slip an angle plate over the dowels at the "T" joint.

Drive ground spike through the end hole.

Walls over 2 layers high should be braced every 1.5m where there is earth on
one side only.

Don't
forget this dowel to lock the layer below

Add a BlocX5 and another angle plate to the next layer

For added security put a cross piece
on the top of the bottom brace.

Continue using plates and short blocks until 2 rows from the top.

The weight of earth on here will prevent the wall tilting.