Hi, yes the hi-amp wires are shorter (less than one inch) and very stiff, besides no connectors are soldered to the wires. What I've done on my recently arrived Lehner (1940/7 hi-amp) is to solder a short 12-silicon-gauge to the wires and solder 5.5 gold connectors to the other side of the wires (where the ESC is connected).

Bye