Hardware Nintendo Switch Flip Side Motherboard [micro sd connector points soldering]

[mitcha]

Hi , i have a question regarding the Flip Side of the motherboard ;

we already have a diagram provided by @mattytrog of the motherboard Front Side ,here :
https://gbatemp.net/threads/about-the-microsd-card-connector.523130/

i would like to have a diagram for the Flip Side please, i managed to break a second switch, same as the first ( child droping/slipping from hand ) ,then ;
pins disapears + soldering = points for soldering disapears too

i would like to solder on the flip side of the motherboard , the problem is , i don't know where to begin !

thank you
some image of what i'm talking about :

Spoiler