I googled ‘terminal test kit’, and it looks to be a kit that offers adapters so you can test circuits without back probing them with hat pins, etc. It looks like it is meant to prevent damage to connectors when you are testing for voltage/resistance, etc. But if you are careful when you back probe, and you don’t jam yer test lead of your meter into the front of a connector for instance, you shouldn’t need to spend the $300 dollars on the kit I saw from OTC. Just buy some hat pins from walmart for 2 bucks, and be careful!