[plugin: woocommerce ] automatic generate upsells

hello to all of the forum ,

I need to know how can I do to ensure that they connect products that I load individually via the product code (SKU) . for example if a load with product code 2844 147h and another product with code 2844 147j, how can I do that they connect yourself through upsells ? I would need an automatic because I have more than 1,500 products already loaded and I want to group.

thank you very much