Just taking this from https://opengear.zendesk.com/hc/en-us/articles/216372923-How-to-upload-an-SSL-certificate since I don’t know how long it will live there.
Here’s all that actually matters.
Cert+CA (in that order) goes in /etc/config/ssl_cert.pem
Key goes in /etc/config/ssl_key.pem
sudo -i
dos2unix /etc/config/*pem
killall cherokee
#wait a good 10+ seconds on slower devices