I'm guessing that these binding posts are the ones with the threaded rod with a hole through them and a cavity at the end that receives a banana plug. So, what are the 5 ways? I can think readily of these: 1. Bare wire poked through hole in post and then held by plastic threaded nut. 2. Banana plug inserted at end. 3. Spade lug placed over post and held by plastic nut. That leaves two! Are they: 4. Pin inserted through hole. (Similar to #1 above.) 5. Bare wire wrapped around post. (Similar to #3.) Or, am I way off here?