You could solder the ground connection from the pot to a motherboard mount and skip the use of a spade lug or loop. You could also just make a loop in the wire with a touch of solder.
To make things feel familiar, use the center and left terminals on the trimmer, viewed from the back with the pins down. This way full resistance is full counterclockwise. Dialing up the voltage will be turning the trimmer the same direction as the volume control on your HiFi.
With the KK266, you may want to do the stage two mod to increase your Vcore. I doubt that the Pin 7 only version will get you past 2.14 volts.
Here are my instructions for boards that use the Intersil HIP6301.
K7G specifics:
You may want to use a 100k pot between Pin 7 and ground. This will allow you to return the board to stock voltage. A 47k pot will cause the board to boot at around 2.0 volts.
The mod is the same as the KT7 series except for the change in trimmer value for Pin 7. With 47k between ground and Pin 7, the board will boot at about 2 volts. Using a 100k trimmer allows the board to boot at normal voltage and obviously makes it possible to reverse the mod by dialing the Pin 7 and Pin 10 trimmers back to full resistance.
KT7 series, KK266, etc:
Solder wires to Pin 7 and Pin 10 of the IC that controls the voltage to the CPU. Put a 47k trimmer (49 cents at Radio Shack part # 271-283) between Pin 10 and ground. Put a 100k trimmer (271-284) between Pin 7 and ground. You can add a 1k trimmer (271-280) in series with the 100k trimmer if you would like to make it easier to fine tune the voltage. Use a spade lug or loop under a motherboard mounting screw for your ground connection. For convenience I suggest you mount the trimmers on a piece of breadboard and secure it to your motherboard tray with Velcro.
Pin 7 controls the voltage, Pin 10 controls maximum voltage threshold. Turn the trimmers to full resistance boot your PC and start VIA Hardware Monitor. Set the polling interval to 2 seconds and slowly dial up the Pin 7 trimmer until the screen blanks. Your PC will probably reboot when the screen blanks. Note the voltage and back it off a tad while the computer reboots. Then dial up the Pin 10 trimmer until your screen blanks and back it off a tad. Go back into VIA Hardware Monitor and dial the Pin 7 trimmer up to 2.3 volts. You may be able to go higher but I don’t recommend it.
Caution this will stress your cooling. Be careful or your CPU could end up a crispy critter. I also suggest buying a third hand device from Radio Shack to hold a pre-tinned wire to the IC leg while you solder. The magnifying glass on the third had will come in handy too. Get in and out fast so you don’t toast the IC. Lay off the caffeine and if you are of age, have a beer a half hour before soldering to steady your hands.
Be sure to tie your wires down to the board. A dollop of five minute epoxy works well for this. After doing several boards, I finally screwed one up. The mod went fine but I snagged the wire to Pin 10 on the end of my workbench and ripped the IC pin right off the board.
Note the pic of the solder points is of a KT7 series board.
Solder Points Pic