Pci X And Pci 324, Where should I connect it? Options

[Tausz]

Good Morning all,

Could you guys give me a little support here,

I've got a G5 2.0 dual and I recently bought an interface PCI 424(G5) . My question is, where should I connect it : on the PCI-X - 64bits, 100Mhz ( slot 2) or PCI-X - 64 bits, 133 Mhz ( slot 4), unfortunately I don't have the manual.

Thanks for your quick support,

Best regards