Farmall Cub

After getting the 100 running real nice I thought I was going to move on to the hydraulic lift, but after a few trial runs I noticed the battery seems to always be low. I put the meter on it, and no charge. First thing I decided to do is to clean the connections. Some were pretty bad, so I have to stop and pick up some properly sized ring terminals on my way to work. Then I noticed there was a ring terminal on the terminal on the rear of the Voltage Regulator, but no wire. After looking through a couple of my other manuals (no manual for a 100 yet) I am under the impression that it should be a ground. Is that the case? If not, what color of wire goes there? I have an extra aqua-greenish-blueish- wire that seems to go nowhere, I assume it goes to my non functioning headlights?

What is the letter under the regulator terminal? If the leter is an "L", not a ground.

http://www.cngco.com/

Go to Cub Cadet, Parts look up. There is a wiring diagram the 102.

If the 100 has the correct voltage regulator on it, that terminal is for the GEN. One side of the VR should have F or FLD, Bat, and L or Load. The other side or bottom should had a Gen terminal, and that bluish/greenish wire connects to that terminal and the other end connects to starter/generator "A" terminal.. The correct VR is grounded thru the VR mounts and does not have a ground terminal. The wire colors are:
VR Gen to generator A, Light blue
Generator A to starter button, Red
VR "F" to generator F, Yellow
VR Bat to stsrter button, Gray
VR "L" to ignition switch, Light Green
Ignition Sw to coil +, Black
Coil - to points, Black
Condenser to coil -.

Some other VR's do have a bottom side GRN or Ground terminal, but those do not have a "L" terminal.

http://www.cubfaq.com/wiringdiagrams.html

Cub Cadet wiring diagrams.