Well, the desriptions how to work with this board are there. Header should be a comfortable way to dump the chip.
The numbering og the header changed though, you might want to check your connections …
Otherwise putting a clamp on the chip should work, too. But it requires some training to get reproducable results. You might try with battery removed or not, jumper removed or not, not all pins connected, maybe different software - there’s some information in a specific CH341 thread:
Anyway- if you can’t dump the chip 2 times with a 100% identical result you don’t have a proper setup…