Connecting 4 awg THNN and 6 awg suggestions

[JJJJ]

Have a situation where I will be connecting 6 awg to 4 awg THNN inside an outdoor waterproof box. I envisioned using a bus bar so that I could ensure good lug connections. This seems to be the most secure method. This will be a stationary location.

I also considered using Midnite breakers to secure the wires. Naturally a breaker on the negative would be redundant but would help secure the wires together.

Feedback appreciated.

 

[Heatpumpman]

I like doing it the old fashion way, a split bolt connector and electical tape.

 

[dopeassjackson]

Wire nut wont work and twist it before?

 

[Gavin Stone]

Use Polaris insulated connectors. Clean and easy to use.

 

[MattMan119]

https://www.homedepot.com/pep/Polaris-4-14-AWG-Bagged-Insulated-Tap-Connector-Black-IT-4B/303577920?g_store=&source=shoppingads&locale=en-US&pla&mtc=SHOPPING-BF-CDP-GGL-D27E-027_011_TOOLS_ACC-NA-NA-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NEW-NA_Priority2024Ended&cm_mmc=SHOPPING-BF-CDP-GGL-D27E-027_011_TOOLS_ACC-NA-NA-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NEW-NA_Priority2024Ended-21843354617--&gad_source=1&gbraid=0AAAAADq61UeIIu2ybv7_OByABkNRZbNfs&gclid=CjwKCAiAiOa9BhBqEiwABCdG8-WorVdJ2Vj_prxtyZCoHQkrTwgjCq5GdQGfWHYGgUaXu-30Xvd30RoCcQgQAvD_BwE&gclsrc=aw.ds