How do you correctly wear full-side medals with skill badges on the Army ASU?

SPC(P) Ngyen,
Great Question! DA PAM 670-1: It depends on which badges you intent wear. Driver and mechanic badges are not authorized for wear. You may wear up to 3 combat or special skill badges. And the devices will go below the medals. I found numerous photos of the Old Guard wearing them above the medals (Thanks for the idea CPT E). Please see:

https://www.google.com/search?q=old+guard+photo+full+size+medals&rlz=1C1SQJL_enUS789US789&sxsrf=ALeKk02EN1sx2iAnya4wJy3FNhP5EFVsgQ: [login to see] 10&tbm=isch&source=iu&ictx=1&fir=Tve9fVaaJleCRM%253A%252CrpTpiqEW0zQ0PM%252C_&vet=1&usg=AI4_-kQSEGbn2aM8FSiEC4r8ypzgU2IdGA&sa=X&ved=2ahUKEwiS1LmfnrbpAhXHVc0KHY4iAWUQ9QEwAXoECAYQBw#imgrc=Tve9fVaaJleCRM

Here is an extract of a book call Wear It Right Army Uniform Book:

Proper wear IAW with DA PAM 670-1 states:

Wear of Full Size Medals:
Personnel may wear U.S. and foreign unit
award emblems as prescribed, when wearing full-sized medals. When
full-sized medals are worn, personnel may wear up to three combat and
special skill badges or metal tab replicas (or a combination) from groups
1 through 5, but may only wear one combat or special skill badge from
either group 1 or group 2 one above the other, above the medals, in order
of group precedence. Personnel may not wear the driver and mechanic
badges with full-sized medals, and they may not wear special skill and
marksmanship badges below the medals (DA PAM fig 20–4 on page 97).

For more information see:
https://www.mentormilitary.com/wear-it-right-us-army-uniform-quick-reference-book-p/mtr-wir-army.htm
Hope this helps:

DA Pam 670-1, Par. 22-7

It may sound crazy, but when I’ve worn mine I have looked at the Old Guard Soldiers and how they wear their medals/badges. A good visual reference is always helpful.