1991 YJ, Chevy 350 with original NP 231 and no speedometer cable please help!

[Trevor Dell]

I bought a modified 1991 Jeep Wrangler with a Chevy small block, SM 420 Transmission, original NP 231 Transfer Case with both electrical and cable connections. The speedometer in the dash has no female connection for the standard cable part # 53008108. So I am at a loss. :???:
Where do I connect the speedometer cable to since it doesn't fit into the back of the speedometer?
What electrical cable do I need to connect the Transfer Case to (I am assuming) the back of the speedometer?

Thanks in advance for the help guys, I have been trying to figure this out for too long now and really need some resolution.
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[Bounty__Hunter]

Ditch the cable, the '91 uses an electronic speedo. The wiring should be part of the factory wiring harness.

Otherwise look for a speedo from an '87-'90 YJ for the mechanical speedometer.