What?? The condenser is just there to attenuate (help eliminate) electrical noise. Coil will fire with or without it if everything else is correct.
OP - the coil, well, is a "coil" - it's just coiled up wires. You'll read voltage on both terminals - because it's just coiled up wires. The coil "gives off a spark" when the "-" terminal is grounded momentarily. In a points distributor, the points do the sporadic grounding. Or it can be done by an "electronic ignition module" which is the case in your ZX. There is a common point of failure in the ZX electronic ignition distributor - search, you'll find it. Ya, download the Factory Service Manual too.
1974 "early" 260Z - L28ET - MS3X full sequential fuel and spark, COP=Ford 4.6 coilpacks w/ Nissan Ignitor, diyautotune chopper wheel - FMIC - T04E .63 A/R - 400cc Injectors (too big!), 14point7 Spartan2 Wideband - C/R 5-speed - Coilovers - Big Brake Kit up front, Porterfield friction all around. Mesa, AZ