I just make pig-tails as needed for my voltmeter. The leads shown will work, but there is the diode issue. If you don't mind voiding your warranty, then you can bypass the diode. I did it. The reason why is that my charger is a peak detection charger and wouldn't work with the diode. That meant I was constantly pulling the battery out which put a lot of strain on the battery lead which I was afraid would lead to the demise of an airplane.

Bypassing the diode allows me to leave the battery in and use any charger I want.

- Paul