1516B SPEAKER REPLACEMENT AND WIRING?

[brianvcskin]

I just bought a 1516b cab (1x15", 1x10", 2x6" & 1xHF horn)
The 10" speaker is missing just wondering if anyone knew what the original speaker and its impedence(ohms) is meant to be. if a can't get the original a suitable repacement will do.

The last owner (rewired) the box and i was wondering also which way to rewire it. a quick circuit diagram would be well appreciated thanks
brian

 

[brianvcskin]

just thought it'd check with anyone if this looks ok i drew it up myself. Does this look right HELP PLZ! :? :? :? (the resistors are coils)