Questions about cadillac 4 note horns

I am looking to change my stock two horns for a set of Cadillac 4 note horns. Are they all the same? I noticed some have different connectors. Some have two horns wired together, some horns have one wire, and some have two wires each.

My car has two horns with two separate connectors. Will I be safe to run two horns off of each connector or should I use a relay? I would prefer not to use a relay if possible to keep wiring simple. I already have shockers on my car but I do use the stock horn on occasion.