Due to their size, Glock 43's tend to have pretty stiff trigger pulls at first. The classic way of improving a Glock trigger is by shooting the pistol a bunch. Put 500 rounds thru it, clean it well, and then try the trigger pull. I think you will be happy with it after that.
And a word of caution here. Use of aftermarket parts open you up to several problems from reliability of the firearm, to liability from other parties in the event you have to use the pistol in a defense scenario. And on top of that, a really light trigger pull on a Glock can be dangerous to your well being, as in a possible AD. I have not found an after market connector that improves the trigger on a Glock, regardless what people will tell you. Connectors on Glocks are very critical as to the reliability of the weapon, and the proper function of the fire control group. You cannot achieve a 1911 style trigger letoff with a Glock, w/o causing other problems. If, after several hundred rounds thru your 43, you still find the trigger un-acceptable, you might be happier w/ another brand of carry pistol that imitates a 1911 almost exactly. I am not saying that you will, but I am just throwing that thought out their, IMHO.
Go shoot that 43 a bunch and then decide.
Best of luck.