@Freediver, what I said is correct.
If the two sets of terminals are connected by jumpers, and let’s say the + wire from the amp is connected to the HF (high frequency) + terminal and the - wire from the amp is connected to the LF (low frequency) - terminal, current flowing to the speaker in the + wire will enter the HF section of the speaker directly from the + terminal of the HF section, but will enter the LF section of the speaker after traveling through a jumper. Current will return to the amplifier from the LF section of the speaker directly from the - terminal of the LF section, but will return to the amplifier from the HF section of the speaker after traveling through the other jumper.
In between the terminals that current enters and leaves each section of the speaker, the high frequency content of the signal and the low frequency content of the signal will be filtered by the crossover circuits. The result will be exactly what I said: Connecting the wires in a diagonal configuration will result in low frequencies being routed through one jumper (in this case the one connecting the two + terminals together), and high frequencies will also be routed through one jumper (in this case the one connecting the two - terminals together).
If that isn’t clear, I suggest that you draw it out on a piece of paper, for a simple two-way speaker which has an inductor in series with the woofer and a capacitor in series with the tweeter, and which has a pair of terminals for each section of the speaker.
In doing so, ***keep in mind that current is the the same at all points in a series circuit.*** And in that situation the + and - speaker wires coming from the amplifier are connected to two series circuits in the speaker: One series circuit between a + terminal of the speaker, the HF section within the speaker, and a - terminal of the speaker, with a single jumper being included in that path; another series circuit between a + terminal of the speaker, the LF section within the speaker, and a - terminal of the speaker, also with a single jumper being included in that path. In the series circuit which includes the HF section of the speaker (including the one jumper which is in that path) low frequency currents will not be present, and in the series circuit which includes the LF section of the speaker (including the one jumper which is in that path) high frequency currents will not be present.
A similar analysis can be performed for the situations in which the + and - speaker wires are both connected to the speaker’s LF terminals, and in which the + and - speaker wires are both connected to the speaker’s HF terminals. The results being what I stated in my previous post for those configurations.
Regards,
-- Al