I got the cable from Amazon. It’s the second piece that goes to transmission speed sensor. Now the speedometer works, but the rpm meter still doesn’t. I am assuming that the electronic box on sensor is fried. The cable ends looked like the wires had shorted out.
That is the speedometer cable. (There are 2 different lengths for cars with or without cruise control. Do you have cruise?
The rpm dial is a tachometer. It receives an electronic signal from the distributor. There are 2 capacitors on the back of the dash module that are prone to failure. Plenty of posts on how to repair (solder work)
The speed sensor on mine looks like the attached photo. I only found it online accidentally, because it only shows up in mr2 models. There is an electronic attachment on the sensor, which begs the question as to what it’s for if the cable is what activates the speedometer? I think it may have something to do with the tachometer