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???What aftermarket?
Why not use the factory one. Great picture in my '17 and my '20.
Just finished installing on my 2020 2500 Laramie, works great. You will need to use AfaOBD, Security Bypass module or cable, and purchase the OEM CHMSL . I found mine on Ebay, listed for $350, offered $300 and they accepted,should have offered less. You can find the wire harness for the Security Bypass and the CHMSL with instructions here:
2016 - 2019 RAM CHMSL Camera Harness | KaodTech
https://www.kaodtech.com/