The affix ṇamul comes after the bandh 'to bind' when a word expressing location is in construction with it.,
Of course, rule 3.4.46 applies here also, and the gerund must be governed by a verb from the same root bandh. Thus चक्रबन्धं बध्नाति 'he binds to the wheel'; कूटबन्धं बध्नाति 'he binds in a snare'; मुष्टिबन्धं बध्नाति 'he binds in the fist'. चोरकबन्धं बध्नाति = चोरके बध्नाति ।,