Yes, you can connect your Total PA speakers via cable. You will need a standard XLR cable. Once you determine which speaker will be your primary, you can connect a cable to that speaker's Mix Out. You can then connect the other end of the cable to a secondary Total PA's XLR In. On the secondary speaker, you will need to adjust the AUX or Line In volume.
If you would like to daisy chain more Total PAs together, you can then run another XLR cable out of the secondary speaker's Mix Out and repeat the steps with a third speaker, and so on.