A diagram may be useful for this situation, one of the ways I would do this is by working out the average traffic on each server, then connect them to each switch so it load balances naturally with the servers connected to each one. This means it is as simple as possible, with as little configuration.
We also do this technique with IP addresses to naturally load balance them in the CORE for BGP, the way you do it is splitting the IP's depending on how many exits, so if you had a /24, for example, you'd half it into two /25's and assign a server to one range and then another server to the alternative range, this way you don't need any complicated configuration but just simply a design load balancing solution.
