You may not even have a WBA 10. Pull the validator out and take a photo of the rear connector. If you do have a WBA 10, the newest software can take up to colored $10's and all others before it ($20's, and $50's, but not $100's and $5's). It has one way acceptance, which means bill must be inserted face up and top of head to the right. If you want 4-way acceptance you will need a WBA12/13 transport plus the harness on the rear of the validator cage must be changed. The newest WBA 1213 firmware for the S+ will take up to new $5's but no new $100's.