coordinates extraction for monocular 3d cube

[mohamea9]

"805": [
{
"score": 0.767203688621521,
"class": 1,
"ct": [
1040.0751953125,
809.3429565429687
],
"tracking": [
15.31903076171875,
8.63873291015625
],
"bbox": [
877.9285278320312,
736.85107421875,
1164.5623779296875,
893.0029907226562
],
"dep": [
20.531949996948242
],
"dim": [
1.4766862392425537,
1.852992057800293,
4.48882532119751
],
"alpha": 1.932727575302124,
"loc": [
1.2986568212509155,
5.106538772583008,
20.531949996948242
],
"rot_y": 1.9958939790211405,
"tracking_id": 58,
"age": 1,
"active": 460

The results are extracted from the video for last video frame "805". I am trying to get the coordinates for points 4, 5, 6, and 7 for the cuboid. These points are located on the ground level. Anyone have an idea. Thanks in advance