How to map snare circled notehead to another MIDI note

By default both regular notehead and circled notehead for snare in a drum staff are mapped to MIDI note 38. How can I map the circled notehead to MIDI 37, which will give me the cross-stick sound?

If you want to input this directly, try changing Input onto kit or grid to Use percussion map on the Note Input and Editing page of Preferences. Then you can play note 37 (C#2) to input the side-stick sound, and note 38 (D2) to input the regular snare hit.