lolalola

Hi Guys, I hope you can help me. I'm planning a kitchen and I need to insert 2 cabinets base filler. I don't want a flat surface and I'm trying to insert the flat pilaster FF-13 I found among the accessories of cabinets. Unfortunately the pilaster appears if the elemet is a free standing, but when I insert it between two base cabinets the filler appears flat. How can I solve the problem? thank you for your help!