That DOES look like it will work...!!
The PIPE Here again---it's just that I did NOT know if your Tiggie's wing panels had any "projecting" ends to place the type of rigging plates onto, that's all!
What you've got in the photos DOES look like a very workable solution to keeping everything in place when your Tiggie's not flying, or on its way to the field. My late friend Hank Iltzsch (he left us late in 2010), who designed and built a series of 1915-16 era British Bristol Scout D "museum scale" 1:4th scale early WW I-era "giant scale" models...
...had to use just about exactly the style of "rigging plate" that I told you about, to keep HIS Bristols' wings "steady" when detached from the fuselages.
I've got a set of CAD-plans going over the long term to do the slightly "earlier" 1915 Bristol Scout C in 25 cm = 1 meter quarter scale, based on Hank's American national aeromodeling club magazine building articles for his Scout D from both March and April 1981 issues of Model Aviation
...I've also got Hank's plans from the AMA national aermodeling club's magazine article here in America for his Scout D, which was originally meant to be powered with a 12-15 cm3 two-stroke mill. Those sizes of "noisy" two-stroke mills were all that were available in the US at the start of the "Giant Scale" era in 1980 for pwoering them, until the Canadian Quadra two-stroke 35 cm3 "noisy mill" came along for powering Giant Scale aircraft at that time. Thankfully for US in the early 21st century, though, with sooo MANY better-sounding and running FOUR stroke
glow ignition and petrol "gasser" model engines available from a growing number of vendors, at least OUR engine-powered model aircraft can sound and fly much better than any old 15 cm3 two-stroke "noisy mill" could ever hope to fly them.
It looks like your whipped-up "prototype" rigging plates only need some foam tape placed along their "contact edges" (where the plates fit against the wing covering) and sizable "hooks" added on the plates' corners to properly retain rubber bands, to keep everything together when the wings get detached from the fuselage...so I'd have to guess you're just about set to have your Tiggie's wing panels all set for "transportation time" next Spring when it's time to fly your Tiggie.
So, just like Hank did for his Bristols, you're ready go "go on further" in checking your Tiggie's wing incidence angles...best of luck as you go onwards with the project!