The ornamental design for a seatbelt for groceryshopping cart, as shown and described.
FIG. 1 is a perspective view of a seat belt for grocery shopping cart
showing my new design, the seat belt being worn around a child's abdomen;
and
FIG. 2 is a front perspective view thereof.
Both sides of the strap are plain and unornamented.
The broken line showing of the child and the grocery shopping cart in FIG.
1 is for illustrative purposes only and forms no part of the claimed
design.