2013 Tacoma - Reverse Light - Splice for accessory?

2013:Tacoma. Regular Cab. Manual everything. No Towing Package. While it has a camera in the tailgate, there is no mention of a backup camera in the dicker sticker nor does it show in the manual for the sound system. I am putting in a mirror dash cam and will be attaching to a rear camera. Their is a wire to hook into the reverse lights to kick the camera on when I put it in reverse. I am also adding a backup alarm. Question splice the reverse light or is there another place to hook into the reverse system or will it matter? Thanks in advance.