💡 mTLS connection between cloudflared and the origin HTTP services

**Describe the feature you'd like**
Hi cloudflared experts. First of all, thank you for creating this amazing product! I have a question regarding the communication between cloudflared and an origin HTTP service:

We have a few micro-services and they talk to each other through mTLS. Now we would like to expose one of the micro-services to our end users through Cloudflare Zero Trust. We don't plan to let end users to provide client cert. Instead, we would like cloudflared to provide a client cert when connecting the origin micro-service. The workflow is roughly demonstrated in the following chart -- we would like to expose service A:


Is it possible to add an option in the origin-specific properties to specify key pairs locations so that cloudflared can load and use the client certs when making HTTP transport to the specific origin? Thanks!

Happy holidays!
Junfeng