Ok, on ALL!!!,, Semi's out there running the road, the CAC, or "charge air cooler",, is on the front, or cool side of the radiator! PERIOD!! Why would they put it on "the hot air side" of the radiator on Motorhomes??? Defeat the purpose! And the A/C cond. is in front of that in most cases! The radiator will be the closest to the motor, unless the fan is blowing the air away from the motor, then it will be reversed? The charge air cooler has to have to coolest air, for it to work properly! Hope that helps? Take a piece of paper, start your coach, place it on the radiator closest to the outside of the coach, does it stay, or get pushed back at you? That will tell you if it is pulling or pushing the air!
PS, As far as the pink fluid you are seeing, it is antifreeze, and you need to check your level in the coolant tank, 1- it just could be a little overfull, and coming out the radiator overflow tube? 2- if it is low, and you are adding to it, you have a leak, and need to find it!