You are getting correct advice so far. This curve is so slight no pre-bending is needed. One hint though - normally, when installing a track or a rail, one would install the middle fastener 1st, then move outward (alternating) in each direction. IN THIS CASE, install an end fastener 1st, then move straight down the rail using the entire length of the rail for leverage. Should make the slight bending easy. Also, as you near the end, you can put a length of wooden dowel slightly inside the SS tube to get more leverage from the increased length, if needed.
Should be an "easy-doer."