Use the corner of the roof to aim and just aim slightly to the right.

Nade Time till goes off : 9 seconds
Smoke fade: 27 seconds after throw

Nade Ranking (stars are rated as 5 is the worst and 0 is the best, so the more stars the more challenge/time/difficulty/risk)

Setup Time: ★★☆☆☆ (approx. 5 seconds)
Practice till Flawless execute: ★★★☆☆ (approx. 4-5 attempts till you can hit it regularly)
Cost of Failure: ★★☆☆☆ (Smoke off map, or elsewhere on B site)
Throw Difficulty: ★☆☆☆☆ (Easy)

Nade Overall Rating: ★Beginner★
|| Beginner- Someone who has uses utility rarely ||