Can't find where to plug in Speedo Cable

[IDoSeaDoo]

Well gents, I need your help once again. The Challenger 4tec project is reaching it's final stages: I'm running wires but can't find where the Speedo cable plugs in. I have a 3-wire plug, but the only one I see on the harness is the wrong colors. Could someone look on their ski and give me a hint? Like what is the next closest plug/wire colors or even what sensor? The harness I'm working with is an 03 GTX S/C
http://www.seadooforum.com/showthread.php?69006-Challenger-4tec-Upgrade/page8

 

[Coastiejoe]

I would think we could look at a wire schematic to confirm wire colors. That said, do you have a new or different harness? Is that why the colors are different? Or do you have the harness that came with the boat?

 

[IDoSeaDoo]

The speedo has a harness about a foot long, and I'm trying to find where it plugs into the original gtx harness, but I can't find a matching plug. I'm out of town, so I can't look at it for a few days, but I know that a black wire is one of the 3. There seems to only be one other 3 prong connector on the gtx wire harness, but it's the wrong colors. Also, the schematic doesn't list how it connects. I'm not sure what it's saying. Looks like it plugs straight into the ecm, but that doesn't have any such plugs