3 or 4 wall intersections?

Is there a 3 or 4 wall intersection? I printed Column-X-TRP-v1.0 as it has 4 clip holes but these holes overlap with others so you can only really fit 2 clips? how do you have 3 or 4 walls intersecting>? How do you attach a square or round tower that is complete with door to the rest of the castle?

I’m trying to build the village of hommlet moat house. And I am lost trying to figure out what piece to print to make a castle that is similar?

Thanks