How to upload a manufacturer or article for 1C Bitrix
For 1C Bitrix, create the "Manufacturer" or "Article" attributes in the base catalog, then fill in the values for them through the formula .
You can also simply specify a macro substitution of the field {BC product: Manufacturer} or {BC product: Manufacturer's Article} in the Additional parameters section, when unloading, the value for the properties from the specified field will be taken.
The full list of fields is in the base catalog grid settings