SW tach parts/source

[Alss]

Bought a beatiful tach from a member here..3 5/8 diam. pedestal mount, solid state internals( no sender). What I need is the grey cased wire that comes out the back and to the motor/distributor. Inside the casing is 4 wires..black, green, red and white..the stub out the back is only about 2 inches lond and a splice on the column would look tacky ...so I want to replace the whole thing!. Anyone know where to get some?? Ill check the local home store and see what they have but I doubt it will match. Thanks

ALbert

PS where do each of the wires go..black ,red, green, and white??