I have a goof proof way to do struts, landing gears etc.
It's called a solder pot....
Metal tube about 3" in diameter three inches deep with melted bar solder in it..

Clean the strut, clean the wire, flux well, heat up pot of solder, with stove, propane torch or what ever will get to a high enough temp.
Dip end of strut in the pot...leave for a minute and pull out..with a old rag quickely wipe off the solder that you don't need...

No need to worry about over heating the wire or getting the solder to flow into entire joint..or having it run out the other side from pushing in too much solder..

BB1