I assume you are asking whether you should inject at an angle? no bro i dont think there is any point in going through the side, just do it the way you would normally inject. Think of it as breaking you chest into 9 (or more if you wish) quadrants. This is the only way to garantee that you lift the muscle AS A WHOLE. 9 jabs seems like a lot at first but you get used it, just make sure you get a 27+gauge needle. pesonally i would even go with an insulin needle, to make sure not to leave any scars. You are probably going to be real sore the first 3-4 days, but after a week the soreness goes away. massaging the muscle sevierly after the injection should also help with soreness. good luck
THANKS BIGA!