Select gateway for Tailscale

I have a situation where one of the machines has two NICs with an Internet gateway on each. NIC1 is the primary gateway for Internet access, but unfortunately it’s behind a firewall which interferes with Tailscale traffic and forces it to use relays instead of direct connections. The other NIC is not firewalled in such way so is there a way to force Tailscale to use that NIC instead as a gateway?