Using whole sign houses, it spans 1-5-9 houses. So I see a grand trine in your chart spread primarily over the first half of the fire signs, with all planets in the grand trine connected within Moon’s orb of 10-12 degrees. So while they will notably influence nearby angles or points, like the lunar nodes or Arabic parts, angles and points do not make up elements of these configurations.
Planetary configurations like grand trines and crosses and t-squares and magic rectangles are comprised of planets.