Thanks for all the good answers.
I should have said box structure. There are 4 sides and a bottom.
They all have to be connected to form an open box.
It goes up in the sail of my 212A.
I kind of figured soldering was the way to go but having never worked with the photoetch I chose to ask.
The hardest part was holding it all together without burning the fingers.
It would have been much easier if it did not have the radius curve at the front.
It turned out OK though. Here is a photo of the part. BD.