At the moment, splitkb.com does not have its own build guide available for the Corne keyboard.
The Corne Cherry build guide by Foostan is written in Japanese, but contains many useful images. Other than the diodes and hot swap sockets being different, the build is very similar to building a normal Corne keyboard. So, next to the original Japanese build guide, also check out the English build guide for the Corne keyboard.
If you have any questions during or after your build, please join our Discord server, where you can ask your questions on the #help channel.