Hi, i was wondering if anyone could help me and tell me what would be the easiest way to put this drain in for a basement sink. I'm quite the novice and only have installed plumbing where the existing already was, nothing every in the basement. If it's as easy as shoving a pvc pipe into any one of those holes than that's all i would really need to know, and which fitting if i were to use the drain #2 in photo? I hope what i'm asking makes sense. I attached photo.