update-ca-certificates

hi there,
i want to install an ssl cert from my router. (openwrt)
i copied the pam file to /etc/pki/trust/anchors/
and run sudo update-ca-certificates -v
output:
running /usr/lib/ca-certificates/update.d/50java.run ... creating /var/lib/ca-certificates/java-cacerts ... running /usr/lib/ca-certificates/update.d/70openssl.run ... creating /var/lib/ca-certificates/openssl ... running /usr/lib/ca-certificates/update.d/80etc_ssl.run ... running /usr/lib/ca-certificates/update.d/99certbundle.run ... creating /var/lib/ca-certificates/ca-bundle.pem ...
after that i tried with wget and curl to verify that it works now but i dosent.
i created the ssl cert with this howto
https://openwrt.org/docs/guide-user/luci/getting_rid_of_luci_https_certificate_warnings
i tired also to import it with the nssdb to make it usable with firefox but there it dosent work also.

any ideas ?
i am on sled 15.2