My fun cruiser- '70 Swinger

Nice car! Looks like battery hold down is missing. Batteries have been known to roll off the tray and into the fan. Replace with stock parts. On any -new to me car- I always change all the fluids, check/inspect tune-up parts/timing, pull all four wheels to inspect brakes/tires/suspension. Check belts/hoses. Then when I drive the car I know that she looks good and is safe.