The biggest problem is that when we play on a stage,the time beetwen two songs is approximately 10 sec., and that is no good...

When we stop playing one song I have to find and select the next one on solton ketron midjay ( we used it to play backing matrix, .wav files ), then i have to select setup on Solton ketron SD1+(upper keyboard), and on the and, select appropriate combination on korg.
My question is: How to reduce the time between two songs, live, on a stage ?
Is it possible to connect those two keyboards with midi cable, so that SD1+ can control 01/W ( how to connect them then ) in a way that if I press ''20'' (using numeric bottuns) on SD1+, the settings for another song automatically change on both keyboards?
Thank you!