I have a Crate 4X12 cabinet and the inside wires have come off the speaker tabs and I'm not sure about how to re-connect them.

There are 4 wires coming into the cabinet with the following colors:
1) Red
2) Black
3) Blue
4) Yellow

Each speaker has two connection tabs, 1 red and 1 black.

Thanks for your help!

It's pretty easy to re-wire the whole thing, connecting series/parallel. You could trace the wires easily enough. But you could also just copy the wiring of an existing cabinet. So hopefully you can find one in a local store to copy.