If you put the cargo light to come on with the reverse lights, unlock has nothing to do with them, unless you have the settings on the truck set to do so. BUT, the diodes are one way, so if your cargo lights usually come on when you unlock/open the doors, reverse lights will not come on.
I had the same mods done on my ‘15, fogs ON with highs, cargos ON with reverse, and puddles ON with doors/interiors. Grey mod is puddle lights ON when doors are open. With the diode installed on GRY1 & GRY8, if you turn ON the interior lights, the puddles will light up, but not with individual map lights. Found out that on my ‘18, I don’t need to do this mod. I’m going to do the fogs/highs & cargo/reverse mods tomorrow. I have a third diode, not sure what I want to do with it, yet.