There's electrostatic shielding and electromagnetic shielding, I'm not sure which is which type. A radio signal has both components, the electrostatic doesn't carry far. A shielded loop antenna is mostly electrostaticly shielded and made from shielded wire (coax) wire but a good receiving antenna in noisy environments like a city.
Where you've got those individual wires going to terminal strips try braiding as much as you can of them, because that makes them into twisted pairs. Especially for the wires in differential pairs an induced noise spike will cause currents in opposite directions that cancel each other.
