In my experience the "cross connect" method averages the loss of single wiring with jumpers evenly across the entire speaker.
First put the jumpers in to tie the positives to each other and negatives to each other. Then connect your positive speaker wire to the positive treble post and your negative speaker wire to the negative bass post.
First put the jumpers in to tie the positives to each other and negatives to each other. Then connect your positive speaker wire to the positive treble post and your negative speaker wire to the negative bass post.