Ok, it's still pretty chilly out there but I hadn't been outside all day so went for a walk and took both mini and main bolas(es?) with me. The mini bolas I was just chucking ahead of me up the path to see how it flew from the different holding points. I then stopped at a park and threw the big one to see if they were similar. I didn't have any target so this isn't checking wrapping ability, just flight but I think some conclusions on wrapping can still be inferred.
Final results:
Holding from the knot - Not much spin so not as spread out so not as wide an area covered. Probably wouldn't wrap all that well but maybe blunt force hits could be better than other styles of throw?
Holding the weight on the longer cord - Good spin so covered larger area. Because the shorter cords have the same size weights they don't separate much so it's almost like throwing a two-ball bolas. Probably will wrap well (also know from previous experience) but kind of pointless to have three weights.
Holding a weight on one of the shorter cords - because of the asymetrical cords and weights, spins very well. All weights spread out, rotates perfectly. Can easily believe this wraps very well. I think this is how these bolas with one longer cord are supposed to be thrown.
Now this was a very quick test with no target and very few throws so this isn't conclusive. Also this is with this specific bolas type with these weights in this configuration. Other types might vary. That being said, I think I've found my personal favourite style of throwing
Would love to hear what other people find through their experiments.