Proper connector for cooktop

[hotchuckwagon]

I previously had a range/oven combo. It was plugged into an outlet that was attached to the 3 wires in the above picture. The wiring is 6 awg aluminum and is on a 50 amp breaker. I now have a cooktop only that I want to power with the existing wires. The cooktop wiring has a red, black and green ground wire. The cooktop requires a 40 amp circuit but states that a proper AL/CU connector be used when connecting to aluminum wiring. What type of connector would you experts suggest. Any other relevant info is appreciated as well.

 

[Jadnashua]

Do you have room to put an electrical box in there? IF so, you could use wire nuts approved for AL connections. Is there a provision in the cooktop to feed in a cable and make the connection inside of it? If you want a plug specified for 50A, one of these will work

https://www.grainger.com/product/49...82713&ef_id=WvCTVAAABKrwUjcG:20180510185856:s

 

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[hotchuckwagon]

I was planning on putting a metal box in there, attached to the back of the cabinet. I am just trying to understand what the best connector would be for this AL/CU connection. Thanks.

 

[WorthFlorida]

This is what you place on the wall with and then get a plug with the matching blade configuration. This is rated at 50 amps but you can change the breaker to a 40 amp. The second one below is another option that would be mounted in a electric box. If you notice the engraving on it is AL-CU, aluminum or copper wire rated.

https://www.homedepot.com/p/Leviton...h-Mounted-Single-Outlet-Black-05206/302480499