You need to swap soc & emmc because soc has (unique) keys for the data on the emmc and emmc has (unique) data for the soc, rest should be no issue
It seems to be a problem with the soc. I disoldered the soc from a donor board and found the corresponding pad under it… so the false switched enable signal for charging the right Joy-Con comes direct from the Tegra X1…
and my skills are not good enough for changing a soc. 
Have you tried using a resistor to force the signal to be high/low?
Could be a workaround but i don’t expect the charging symbol to appear in the controller menu
Hi friend. Sorry for digging up. My switch (left joycon) is missing 5v which can charge the joycon. Do you know which component link to it.thank in advance.