Amending Query To Get Info From New Table

I used to use this code to extract coupon usage from two tables orders and coupons

select distinct o.OrderDate, p.SKU, c.CustomerID, c.CustomerLevelID, c.Email, c.FirstName, c.LastName from customer c
join dbo.Orders_ShoppingCart os with (NOLOCK) on os.CustomerID = c.CustomerID
join dbo.Product p with (NOLOCK) on p.ProductID = os.ProductID
join dbo.Orders o with (NOLOCK) on o.OrderNumber = os.OrderNumber

[code]....

Following a database upgrade the Coupon Code is no longer used. Instead there are two new SQL tables called Promotions and PromotionsUsage.. The link between the two tables are

ID in Promotions

and

PromotionID in PromotionUsage

Both are the same value. So in order to see new orders for coupon usage how would I change this line in the original SQL to retireve this?