Fixes #12702 - Adds widget to FrontPortTemplateCreateForm

netbox/dcim/forms/object_create.py

@@ -101,6 +101,7 @@ class FrontPortTemplateCreateForm(ComponentCreateForm, model_forms.FrontPortTemp
         choices=[],
         label=_('Rear ports'),
         help_text=_('Select one rear port assignment for each front port being created.'),
+        widget=forms.SelectMultiple(attrs={'size': 6})
     )
 
     # Override fieldsets from FrontPortTemplateForm to omit rear_port_position