Solder! The first three computers I built, I soldered individual components onto PCBs. Two SWTPCo 6800s which belonged to my then employer: the Polytechnic of North London, and the third was the property of the North London Hobby Computer Club. That last was an 1802 COSMAC Elf2. I still have that one, but am going to donate it to the National Computer Museum http://www.tnmoc.org/

And what about wire wrap? And computer clubs, for that matter?