I don't know or see the OVRScript class but isn't OVR rather a member of Script_1?
And then you would want to use GetComponent on the Front in order to get a component attached to it.
// If possible rather drag your Script_1 in here directly via the Inspector
[SeializeField] private Script_1 src_1;
void Start()
{
    // Now I would use find only as fallback
    if(!scr_1) src_1 = GameObject.FindObjectOfType<Script_1>();
    // then you want to assign the OVR field of the 'src_1' of type 'Script_1'
    // and not use 'src_1.GetComponent<OVRScript>()' which would return
    // the reference of an 'OVRScript' component attached to the same GameObject as the Script_1
    //
    // And you want to fill it with the reference of an 'OVRScript' attached to 'Front'
    src_1.OVR = Front.GetComponent<OVRScript>();
}
(see [SerializeField])
It would be even better if you directly define
public OVRScript Front;
now if you drag in a GameObject it a) is checked if this GameObject actually has a OVRScript attached, otherwise you can't drop it and b) instead of the GameObject reference already the OVRScript reference is serialized and stored so there is no need for GetComponent anymore:
[SeializeField] private Script_1 src_1;
public OVRScript Front;
void Start()
{
    // Now I would use find only as fallback
    if(!scr_1) src_1 = GameObject.FindObjectOfType<Script_1>();
    src_1.OVR = Front;
}