Database Software

WE have the following scenario

WE have a 3 node RAC. We have 2 clustered OLTP databases (db1 and db2). We have built 2 sevices srv_db1 and srv_db2 to service the requests to the databases. So does load balancing happen across these services?

For example

Currently say there are 50 users connected to srv_db1 via node1. There 2 users connected to srv_db2 via node2. ( A total of 52 users connected to node1)

There are 2 users connected to srv_db1 via node2. There are 100 users connected to srv_db2 via node2.

So new user wants to connect to srv_db1? Does he go to node1 or node2? If the load balancing needs to be done using the number of connections.