that's right. the screw (53) should not be visible. it is concealed behind the cover (56).

thank you for your kindness in giving me a computer. i hope this one doesn't break down yet. it will be too troublesome for you to send this thing to me.

i must have something to return your kindness first before accepting it... such as giving you a free software of WIS (workshop information system). i know you enjoy taking time doing things for your car.

cheers.