How to change SSL in VESTA?

Question

Digital certificates

Greetings friends!
I need to change SSL from Lets Encrypt to my own from RuCentr
PU - Vesta.
I can't figure out what to put in where.
Here is what I have:

Root certificate (root_pem_rucenter_platinum_ssl_1.crt)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Intermediate certificate 1 (intermediate_pem_rucenter_platinum_ssl_1.crt)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Intermediate certificate 2 (intermediate_pem_rucenter_platinum_ssl_2.crt)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Certificate (pecoltd_2020_12_13.crt)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

How to insert two intermediate certificates? One by one?
What is the key, and what is the certificate itself?
The key must begin with -----BEGIN RSA PRIVATE KEY-----, so there is no key here? But this is all that the rucenter provides me.
Thank you in advance for your help!

Answer 1

The key is not here. The key should have remained with you when the CSR was generated for transmission to the rucenter. If the key was generated by the rucenter itself, let it give it back. You have an issuing root CA, a chain of intermediates, and a certificate itself.