Sry for answering too late @koenhendriks im currently hyper busy…
Try following on your own risk:
dont try to lever the silver part away otherwise it will break pins (it happened to me)
Try to get in between the silver and black and try to lever the black UP instead (this worked for me)
ideally maybe use more than one plastic thingi.
Thanks for the images and tips 
Don’t feel pressured to respond as fast as possible, I don’t feel entitled to a fast reponsive on a forum 
Got the last parts today and soldered it all to the PCB.
Creating the home assistant card now and can’t wait to brew my first coffee from Hass tomorrow. Everything seems to be working.
Thanks @The-May , not only for sending the parts but making this look very tempting to do as project by creating this forum thread 
If any one is interested I adapted the design to a m5stack atom:
This will give you at minimum a Bt proxy as a bonus on your coffee machine.
WIll still need to get my hands on them and test them. But for the price I added a few extra to the card 
I removed the aux, motion and I2c port of the PCB, as the atom has a I2c port built in with a grove connector.
