Convert internal roof bars to fit Multispace 2017?

[dinesy]

Hi there,

I have a Berlingo Multispace (2008-2018) and got some internal roof bars second hand (I believe they're from a 2010 XTR).


While they fit into the "door keyholes" above my windows they don't stay tight. I've been clicking round this forum and saw a post that said the 2010 XTR had hidden fittings to secure the internal roof bars- does anyone know if this is correct? 

Does anyone have any idea how I might modify either my car or the roof bars so they fit securely?

I've seen the DIY internal roofbars on this forum- v impressive. However, I wanted the real thing just to be safe...looks like I'm going to have to do a bit of DIY after all!

Any advice would be golden,

Hannah