Trajectory simulator does not work on front guides, right?

It work only on front guide, it's the point of launching the bomb.

If it was using rear guide it'll say " drop using the 5 template"

From the news page of the resistance bomber (https://www.fantasyflightgames.com/en/news/2017/11/22/turn-the-tide-of-battle)

Quote

The Trajectory Simulator system upgrade allows the Resistance bomber to launch bombs from its front guides, rather than dropping them from the rear. Anytime the Resistance bomber—or another ship equipped with the Trajectory Simulator—would drop a bomb as it reveals its maneuver dial, it can instead choose to launch the bomb, placing the straight Speed 5 template in its front guides and then placing the bomb token at the other end.

I'd say 'read the manual' but it's only in the Resistance Bomber manual, and not everyone who's using the card has access to that

'Launch using the x template' means 'put the x template in your front guides, and but the bomb on the end of it using the nubs on the bomb'.