I guess EHU connectors are meant to be tight fitting. Mine goes in fine but then to get it out I have to pull quite hard while wiggling it from side to side at the same time.
Is this normal ?
Is this normal ?

in slightly then push down on the release lever it comes out easier
That's exactly what I'm thinking when I see the back of it oscillating as I'm pulling. I tried not putting it in all the way after the chat here and it did come out a bit easier so this is an approach I will try out a bit more.