Heat each solder point with the soldering iron. Add a bit more solder. Don't glob it on, you'll end up shorting the adjacent points. The points your really want to hit are the terminals where the little side boards attach to the main board. There is a little flex here and that can lead to cracked solder joints over the years.

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970