From your picture, it appears that you need safety chains. Not just from the swing arm section, the chains must extend and be secured to the ridgid section of the reach, as well as the swing arm section. If the swing arm were to separate at the joint, no chains would be there to prevent your trailer from remaing attached to the tow vehicle. As it appears you do not have brakes on your trailer ( I see no brake lines in your picture) the results could be catastrophic and possibly not covered by insurance.