YITH Request a Quote for WooCommerce enables an advanced system through which your users can ask for a quote for one or more products, get a quotation from the admin per email and, if they accept the offer, proceed to the checkout at the agreed price.
The integration between the two plugins allows you to add a composite product to the quote and ask for a price estimate to the site admin: the quote will include all the products selected as components.
No specific setting is needed, just make sure you have installed and activated the premium version of both plugins.
The composite product with all selected items in My account:
The composite product with all selected items in the quote details:
To learn more about all the features and settings of YITH Request a Quote, please, refer to the official plugin documentation here.