Adding second node, best approach?

I started building a second relay node via CoinCashew Guide and the node is up to the point where it synchronizes (almost done).

What is the best way to get this second node configured and running properly with Cardano, the BP and other Relay Node, i.e. generate certificates required, steps, etc.? Is there a guide for adding a second node that doesn’t use CNTOOLS (I didn’t build it with CNTOOLS :/).