This is a technique I used to use way back in the 70s. The circuits were wired together with tinned copper roughly in the shape of the schematic. One day one of my students had a circuit that didn't quite work, all the voltages checked out but were on the low side.
Then we found out instead of using tinned copper he had used solder! :o
How he managed to attach resistors and capacitors to strands of solder without melting everything I will never know but it was taking art to another level of skill coupled with stupidity.