I need to bypass the service indicator on my early BMW E30 to make the instrument cluster work again but first I need to improve my soldering skills.

Useful links:
E30 Clusters (for parts and workshop manuals): https://e30clusters.com/

Tim’s Classic Parts (a range of 1970s/80s/90s BMW bits, including replacement SI board batteries): https://www.timsclassicparts.nl/

Chapters:
00:00 The problem
00:16 Fear and loathing of soldering
01:03 The cluster problem
02:48 Getting the clocks out
03:32 Soldering right
04:18 The SI board bypass
06:45 What about a proper fix?
07:27 Refitting is the reverse of removal