Thanks for the hint. I wrongly assumed that the connections were stored wihtin the crypted kdbx file. The XML is easy to read.
Each sync target in "Synchronize -> Recent Files" has settings which were set when first syncing with that file. These settings are stored within KeePass (otherwise "recent files" wouldn't work). I just want to view / edit them.
Update synchronization targets
Add target to create separate html pages instead of one chunk
My customization layer looks like <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"...