connected accounts -> zammad integration forces https://

I'm testing the zammad->nextcloud integration, but i'm unable to specify the "Zammad instance address", because what every you try todo it always prefixes the address with https://.
I'm not sure if the server will use this address to connect with zammad, or if the connection would run via the browser, which for me would require to specify a different address, due to the setup in containers.
I'm not really concerned about about a secure communication at this point, because either it's container to container traffic, within the same subnet, or if it's via an browser connection, all traffic is routed through a VPN. So http:// traffic is fine.

The relevant code seems to be here; https://github.com/nextcloud/integration_zammad/blob/master/src/components/PersonalSettings.vue#L160

Start in src/components/PersonalSettings.vue around line 160 and trace how the Zammad instance address is assembled and used. Confirm whether an http:// address can be entered and used for the integration, including the container or browser connection described in the issue; done means the address is no longer forcibly prefixed with https://.