Connect the price lists in your webshop with the price lists in Brightpearl, for orders sent to Brightpearl.
Each row connects:
a price list in your webshop, and
a Brightpearl Pricelist ID.
Good to know
If you also send prices from Brightpearl to your webshop, this mapping should be the same as the price list mapping used there, just the other way round.
If a list is empty, check that both systems are connected. An empty list almost always means the connection, not the setting.