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Hello. I understand you're having some issues with your ThinkCentre having replaced the power supply. If I'm understanding the request properly, you need assistance with where to plug the turbo switch in?
You should have a motherboard that looks something like this image: http://forums.lenovo.com/t5/image/serverpage/image-id/18753iE272D114FE4E4FA7/image-size/original?v=mpbl-1&px=-1 in which case you would most likely be connecting a front panel connector to item 11.
The schematic is attached to this.