Those ends just look unsafe, hope they didn't arrive that way.
From:
http://www.cruisersforum.com/forums/f55/sta-loc-vs-swaged-cable-ends-for-off-shore-vessels-573.html
"As a rigger out sailing . I prefer swage fittings . The wire will break before the fitting fails IF corrosian is controled .do not allow water to enter the fitting . the best method is to fill fitting with a sealer before swaging . Mechanical fittings are great in an emergency and they will hold beyond the strength of the wire if they are installed properly .In my experiance I have seen only 30% installed correctly -that is evenly loading the strands of the wire."
"Most “General Purpose” Silicone sealants are “Acetoxy” rubbers, that release acetic acid as they cure. This acid attacks many metals, and makes it a poor choice.
Most “Marine” Silicones are “Neutral Curing” (Alkoxy), which release methyl alcohol (sometimes ethyl) as they cure. I always use a NEUTRAL CURING Silicone."