Does your candy cab use a single slot or a multi slot MVS board? If it uses a single slot, then it's pretty much standard JAMMA, and you can plug the Y2 right in.
If it's multi slot, then don't plug your Y2 straight in, because you risk frying the audio circuitry. Your options in this case are to get a Jamma to MVS converter or rewire your cab's speakers for standard JAMMA. If the wires aren't soldered on to your speakers, it's actually pretty simple. I actually just did this on my Neo 25 cabinet so that I could use my single slot board and Pandora's box.
Simply disconnect the ground wires from the negative terminals of both speakers, move the remaining wire on the left speaker from the positive to the negative terminal, then get a short wire and use it to connect the positive terminal of the left speaker to the negative terminal of the right speaker.
edit: and don't forget that when looking from the back of the cabinet, the left speaker is gonna be the one on your right.