You might want to consider eliminating some of the binding posts on the crossover box by simply passing the speaker wires out through a small hole in the enclosure. Just attach spades (or whatever) to the ends that connect to the speakers. Even if you decide you want to change wire later, it would be easy to do provided that you make the crossover enclosures easy to open. (For example, attach the bottom with 4 screws or something.) This change alone would eliminate 6 pairs of posts, assuming you have 2 speakers with connections for the tweeter, mid and woofer.
You can take it one step further by passing out attached wires for the connections on the amp side of the crossover enclosure as well. If you already have speaker cables that you want to use, however, this might not be as attractive an idea.