On a CycleTote bike trailer with a seat post tow bar the safety strap is replaceable. This strap can replace both the safety strap with a clip, or it can replace the CycleTote safety strap that is made of hook and loop (velcro type).
The replacement safety strap keeps the bike and trailer connected in the unlikely event that the hitch disconnects.
This replaces the velcro safety strap or the clip safety strap on the wishbone tow bar. The tow bar hardware will need to removed, then add the new safety strap and reassemble to tow bar hardware.