fruit adding advice

so i have a american wheat beer kit and have a recipe that adds orange and lemon zest the last 15 minutes of the boil. I'm only wanting to add orange and was also wanting to check on something else. so zest is different from just peeling the oranges and putting them in the bag to boil right? should i use zest or the whole peel for more flavor. Also would you squeeze some of the oranges and add the juice maybe for some more flavor or would this over take the beer flavor. any advice would be awesome thanks so much for all the help you guys are super informative.

BEN

Don't use the whole peel, the pith will be bitter and awful. You only want the orange part on the very outside, that is where all the citrusy goodness is.