Alright, I find it kinda funny that someone named Tesla is asking an electronic question
You can use any connector that is hefty enough for the current the panel is capable of. It doesn't care what the mechanical configuration is.
My suggestion to you would be to do the permanent mount and wire it to the controller first, then take your portable, select a quick connect and do it straight to the controller as well. They can both be wired directly to the controller.. they don't care as long as they are paralleled correctly at or before the controller.
I have used audio connectors (Speakons, 1/4 phone plugs and jacks etc) and most recently am using trailer connectors, Bargman 6 pins.. using only two of the pins. Trailer wiring connectors are easy to find anywhere and their hefty barrels make them bullet proof.