How to unload the unit coefficient field when exchanging from 1C to Bitrix?

Question

1C-Bitrix

In the online store on Bitrix there is a field "Coefficient of unit of measure" for goods.

In this field, it is necessary that for some goods the value "10" is unloaded from 1C Enterprise Trade Management. Where is this parameter written in 1C for the nomenclature?



The second option, is it possible to register this value in the goods in Bitrix but during the exchange so that this field is not overwritten?

Thank you