If you want to build a big nest wall, you'll find in this notice all usefull instructions. Other manuals are available on demand (smaller : 2 columns of 2 boxes or bigger : 3 columns of 3 boxes). Ask for it. Regarding the filling of boxes, refer to the back of the cards available online to build nesting boxes for [3]individuals [3].
Links:
[1] https://urbanbees.eu/sites/default/files/ressources/notice-3KS-1KOL_english.pdf
[2] https://urbanbees.eu/en/pageressources/professionals
[3] http://urbanbees.eu/en/ressource/bee-house-model-gardens