Boiler pressure top up - cannot find filling loop

[Adrie1]

Hello,

I am trying to top up the pressure in my boiler but I cannot find the filling loop even after watching a lot of tutorials. I know why the pressure decreased (radiator leak) so now it's solved and I just want to top up the pressure.
Could you please help me with the picture attached if you identify what I need to do?

Thank you,
Adrien

 

[breplum]

Don't know what your model is. Looks like drains are there, so maybe purge those lines. There should be permanent pressure for auto refill.
Just guessing:
Most wall hung systems have auto-fill as part of cold supply.