Just follow the original playbooks:
Before anything you should test with just 1 NIC on each Spark and 1 QSFP cable (connect the same port on each spark) and Give it /24 IPs on both Sparks, Verify ping works bidirectionally.
This instruction work fine for 2 cables, but it’s not really needed:
Please take a look at this thread if needed: ConnectX-7 NIC in DGX Spark