Floor mounted anti-tip mounts / brackets?

[JohnEGraham]

Hi, I purchased a portable AC unit which I am keeping in the mid-cabin. I took the roller casters off and would like to install some kind of anti-tip device so I can remove it as needed. I could always install some metal brackets using the old Caster holes that i can screw down. The unit is bottom heavy ( compressor weight) and pretty much keeps steady but not sure about heavy seas? Seams to be only refrigerator type brackets when I do the "Google" Thanks. John G

 

[JohnEGraham]

Maybe some thing like this? Screw right threw the bracket so doesn't unfold and mount the swivels on the ground.
http://doitbest.com/Main.aspx?pageid=64&SKU=214413\