need to make a switch for my 2,000 lb superwinch 12 v. mine went missing with all the wires ?
thats about it. there are two terminals coming out of the end of the motor.

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There are specialist "contactors" needed - you can pull 150A or more under some circumstances. Look for "replacement winch contactors" on Google for a local source to you.
You can get single boxes that will do the job, like this one http://www.amazon.com/WINCH-MOTOR-REVERSING-SOLENOID-CONTACTOR/dp/B002SKU28K/ref=pd_sbs_auto_2
You can use this inst. for a guide to wire your new switch.
Your switch and wires MUST be able to carry the load of the winch. You may have to use a relay to carry the full load.