Ive done a lot of mods on my cluster including replacing the bulbs with led lamps, replacing the regulator with a solid state adjustable one and and rewiring the entire cluster to replace the printed circuit board.. disconnecting the speedo cable takes about 10 seconds, ive done it prolly 20 times to do the mods..to disconnect the cable, KNEEL OUTSIDE the driver door fac8ng the cront of the car, with your left hand reach up behind the dash on the left side of the steering column, just to the right of the vent cable, then over the steering column. Find the speedo cable.. follow it up to the speedo, there is a retaining clip holding the cable into the speedo, on top of the retainer is a square tab, press down on the tab and the cable slips right off.. to replace the cable... kneel outside the driver door, reach up and over the steering column, find the cable, slide the retainer clip back along the cable a few inches, insert the cable into the speedo, and make sure it is completely seated into the speedo. You might need to apply pressure to the cluster to insure the cable is inserted all the way into the speedo, and or to remove and reinsert it a few times until the cable is aligned with the socket in the speedo. slip the retainer up onto the end of the cable till it latches, you are finished...