Usually there's a good center-spot on the front and rear for the entire end of the car, then put the jack stands in the proper place under the pinch weld.
If you don't have them already, get some of these to keep your pinch welds from getting bent up and rusty.... ...https://smile.amazon.com/DEDC-Universal-Slotted-Rubber-Medium/dp/B01MQD0YXO/ref=sr_1_6?ie=UTF8&qid=1520305806&sr=8-6&keywords=jack+pinch+weld+adapter