He wiped his ears inside and outside. Hisham adds: He inserted his fingers in the ear-holes. (Using translation from Abū Dāʾūd 123)
رَأَيْتُ رَسُولَ اللهِ ﷺ تَوَضَّأَ قَالَ وَمَسَحَ بِأُذُنَيْهِ بَاطِنِهِمَا وَظَاهِرِهِمَا زَادَ هِشَامٌ أَدْخَلَ أُصْبُعَيْهِ فِي صِمَاخَيْ أُذُنَيْهِ