@anpaternina I am sorry that the instructions are still incomplete for the nano electronics workaround. There are a couple of posts where it is discussed:
Custom ofm for project - #10 by WilliamW - which is my explanation as far back as May 2024 
First build - High Resolution OFM - #2 by mzedp has a good photo of the boards installed, but you cannot see the clip as it is at the back end of the nano.