Manually deploy LetsEncrypt certificate to Kubernetes

One of my systems (Rocky Linux 9) collects wildcard certificates from LetsEncrypt and distributes it to the various systems that require an SSL certificate. I also have AWX running on Kubernetes (CentOS Stream 8) and I want to use the LetsEncrypt certificate for that system as well (So I DON'T want Kubernetes to manage the certificate) How can I deploy the certificates to Kubernetes and which of the files cert.pem, chain.pem, fullchain.pem and privkey.pem are required? Thanx in advance for your help