Zde je manual.
https://hp.it-shop.bg/uploaded/7/10/ProBook-470-G4-MSG.pdf
Pokud chcete dat SIM, musite mit model vybaveny WWAN kartou a WWAN antenou.
Anebo si to muzete v servisu prikoupit, vic jak 6tisic korun to stat nebude.
P.S.
Smula na YT jedine videjko k tomuto modelu a zrovna kus na technikove stole WWAN nemel
https://www.youtube.com/watch?v=uc5-yJaIvgA
HP ProBook 470 G4 backward assembling process