The OTC mini test lamp has a threaded section on the probe tip
www.otctools.com
You can buy a 4mm banana plug adapter that fits the test lamp
Threaded 4mm Banana Plug Adapter designed to convert a threaded OTC 3266 or other OEM automotive test light circuit tester or threaded test probes to a 4mm Banana Plug.
warwickts.com
I cut the alligator clip off my test lamp wire and added another 4mm plug
PJP 1066 4mm Stacking and Shrouded banana test plug. Safety rated to 1000V CAT II / 600V CAT III / 300V CAT IV. Discover these durable connectors features.
warwickts.com
Now I can hook it up to any kind of probe or extension lead (I like to use my power probe extension so I can have power and ground for the test light)
SpecificationsManufacturer: Power ProbeModel Number: PN3049Product Name: Power Probe III 20 Ft Extension CableLength: 20 feet (approximately 6.1 meters)Weight: 0.65 lbs (approximately 0.29 kg)Compatibility: Designed for use with the Power Probe III diagnostic tool.PN3049: PN3049Key...
www.toolsource.com
You need the battery clips too
I realise this seems like a lot of ridiculous work and expense for a simple test lamp, but what did you expect on GJ?
This kit makes a very useful tool for bypass testing and stops you having to walk backwards and forwards all the time to switch from positive to negative and you have 100% reliable connections
If your in the USA try "Jarhead diagnostics" as he sells some of Warwick Test Supplies stuff