Image click to open Lightroom carousel of additional images, not images in gallery block

Hi Squarespace team, 

Currently building my new portfolio using the Matsuya template. 

The images in the gallery block currently open to a Lightbox carousel of the images in the block. I want them to open to a new set of images.

For instance: 

Current grid:
Project Image 1a       Project Image 2a       Project Image 3a       Project Image 4a

Click Image 1 > Opens Lightbox carousel to display Project Image 1a, scroll to Project Image 2a etc.

I want:
Project Image 1a       Project Image 2a       Project Image 3a       Project Image 4a

Click Project Image 1a > Opens Lightbox carousel to display Project Image 1a, scroll to Project Image 1b, scroll to Project Image 1c

Please please help.