In order to connect a service to the OCN, you must choose which OCN node you want to connect to, and know the node's public wallet address. You will then request a registration token (Token_A) from your selected node.
In order to connect a service to the Open Charging Network, you must decide which OCN Node you want to connect to.
Once you select a node operator that you want to connect to, you must:
Request a registration token (TOKEN_A in OCPI terms). Note that this token is only temporary and will become invalid once the registration is complete.