MOD-MAN

Hello, just curious about the rear camera swap. Is this a different camera than is already in the tailgate. I have everything needed including cables but I originally thought this was the camera you used for the invisible trailer so now it has me curious as to why the rear camera has to be swapped out. Now that I have everything, I am starting on this now, will the system still function until I can get ahold of the other camera or will it mess up anything? Also, besides obviously disconnecting the battery, is there anything to be cautious about when powering up or testing for the first time?Thank you for any info you can provide.