Those spade lug piggy back ones are really great for adding circuits to a fuse panel, but I've found these wire taps to be way better than the U-haul clamp on type for tapping into a wire. posi-products Tap It

British Wiring has them as well.
//www.britishwiring.com/1-4-Piggy-Back-Spade-Terminal-p/c229.htm

//www.vehicle-wiring-products.eu/product.php/445/piggyback-connector

//www.vehicle-wiring-products.eu/section.php/203/1/stationary-blades

Well, I think I found what I was looking for....finally.

https://www.narva.com.au/products/56028BL

Been trying to find these brass wire tap/bridge connectors where it is "U" shaped and allows two female ends to bridge on to one terminal spade at the fuse block.

I like the simplicity of these vs the problematic clamp on taps that has a tendency to fail over time.

Anyone know what these are called or where I can source?  I'm sure I don't have the correct technical name for these, but hoping the pictures help.

TIA!