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If you cannot solder, you could attach wires to aluminum foil with paper clips, if the traces were brought out to larger pads designed for paper clip attachment.
Glue some metal foil to plastic the correct thickness, then cut out non-conductive channels between the traces. Although you do not want to mix different metals at contact points for long term "permanent" use (due to galvanic corrosion), this should not be a problem with a temporary connector.
For more permanent use (such as an external keyboard), I would use copper-clad printed circuit board (PCB) material, but for temporary use (such as debricking) -- hey, whatever gets the job done!
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