Hello,
In the order details, for the product listing, you have two icons.
One is to add a "custom" product (the plus icon) and the other one to add an existing product (the package icon).
Via that second button, you would have to select the product and then you will have the interface of your screenshot (but with the fields pre-set).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.