Endorsed car chassis is not working

[Krixpp]

Hello, I made my own golf cart:

But I am trying to give it the endorsed chassis made by Roblox:

But when I link it to the cart, I do as much as I can but it still ends up flying and glitching across the place. Any help will be appreciated!

Here is the link to the Chassis: Sedan - Roblox

[LiteGGaming1 (Lite)]

Did you weld it to the car itself? That might be important

[Zsark12 (Janzzo)]

Tried to use the same thing, but when i try to move the wheels the steering glitches