Welcome to AudioCircle, ggaites!
The output terminal spacing is fine as long as no shorts.
You have steel (magnetic) nuts and bolts in the magnetic flux path of the inductors (lined up with the hole axis.) That's a no-no because the steel interferes with the flux path of the coil.
Steel parts also should never be in the electrical signal path. They can be used as a mechanical clamp to hold non-ferrous signal conductors together, but it's still better to not have any steel touching the circuit at all. At the XO input you have a terminal block with steel conductor strips between the attachment screws. That's bad news because the signal will actually flow through steel. So you must attach your crimp connectors as above, stacked together on the same screw using the terminal only as a mechanical clamp, not as signal conductor. On that kind of terminal block the screws might be deformed at the end so they can't be removed, so you might just ditch that terminal block. You can use terminal solder strips instead, if you like the concept. Or...
The best solution is to solder to the crossover directly, or use WAGO connectors if a temporary connection is required. Manufacturers invariably use spade connectors, but these can have problems too.
