How to add Image in collection shown in menu

Store Design
,
1

I am working on a theme i have put collection in menu and add lists all the collections in that now when we click or hover on collection it shows a space for image can anyone tell from where i can add that pic

Any kind of help will be Apriciated.

THANKYOU

MohammadAhmad_0-1711342027718.png
MohammadAhmad_0-1711342027718.png1366×768 165 KB

2

if your theme supports mega menu then you can add it