speedo hookup help!

i am doing a engine and trans swap in my 89 b2200 mazda, the manual trans that i am putting in has eletronic speedo how do get this hooked up to factory mechanical gauge????

Check with this compandy. Speedometer Service Co.www.speedometersolutions.com
414-4636661,ask for Roger
I got a 22mm senor w/ a tang drive that went into my trans, for use with Autometers electric speedo.