Importing ca-certificate chain (.crt) - RHEL7

I am fairly new to this but I’ve done some internet research the last 2 days and I couldn’t find an suitable answer.

I have been given a ca-certificate chain (cacertchain.crt) which I need to import to a server running RHEL7 (no GUI). The server has the ca-bundle.crt file. I have tried to put cacertchain.crt to /etc/pki/ca-trust/source/anchors/ and run update-ca-trust and update-ca-trust extract but I couldn’t see any changes to the ca-bundle.crt file.

So my question: is there a way of importing a ca-certificate chain (.crt) to RHEL7 keystore?

The certificate chain (cacertchain.crt) includes:

Root Certificate Subject CN – VeriSign Class 3 Public Primary
Certification Authority – G5 (I believe this is already available in
ca-bundle.crt)

Intermediate Certificate Subject CN – Symantec Class 3 EV SSL CA – G3