A good technique to follow that will always start you out on the right foot when setting up your control hookups.............

Make the connection in the surface's horn in the hole farthest from the hingeline and the connection at the servo in the closest hole to the servo. As long as you're using a horn on the movable surface that's appropriate to the size airplane, then using the farthest hole will give you a good starting point.

Then, crank up the radio and check the surface throws to see if they're what the designer recommends. They will almost never be too much. If they're spot on, you're good to go. If they're not enough, then move the connection on the servo arm out as your first choice. You want to leave the connection out at the horn in the outermost hole until you have no other choice. (If they did happen to be too much, your only solution is to replace the surface horn with a longer one.)

Always have your initial assembly start with the connection to the surface's horn with the connecting rod in the outermost hole.

Keep in mind that computer radios can change the amount a servo rotates, but you don't want to change that from 100% unless you have no other options. Whenever you change the servo throws in your radio TX, you're either reducing the accuracy of control or reducing the servo's power. Neither of those are worth doing just to save you from swapping out a dollar's worth of the wrong hardware.