OK, you've asked two very different questions here.
First, attachment of the
trim chain to the
lift line ..."eye of the
wire rope".
Second, "attaching scenery to a
batten."
Attaching the
trim chain to the
lift line eye should NOT use a
shackle OR a
quick link. The
lift line eye MUST be formed around/through the end link of the
trim chain. The chain is then wrapped 1 1/2 times around the
batten and a
shackle is used to attach a link of the chain back to the
lift line eye, NEVER to a link of the chain. I do not approve of using a
quick link, even if it is rated, for terminating
trim chains.
Attaching scenery to the
batten can be done in any number of ways, depending on what the
unit is, how it is constructed, how much it weighs, how many lift points are
practical,
etc. I personally do not approve of using quick links because there is (to my knowledge) only one truly load rated brand and it is a European make not widely available n the US. Of course there are also many unrated shackles available through big box stores and name brand hardware stores.
The quote you cited listed 3/16"
shackle, this is NOT an acceptable size for
trim chain termination.
Trim chains should be attached with a 1/4" minimum
shackle in conjunction with minimum G30
proof coil chain. If using STC or Alpha G63 chain, one should use a minimum 5/16"
shackle. 3/16"
shackle is an acceptable size for attaching scenic units using 3/16" or smaller cable or 3/16" or smaller
proof coil chain. NOTE: DO NOT use any non welded chain to rig scenery or objects overhead.
Hope this helps.