94 festiva instrument cluster

[gtxb67]

hey all
a mate has a 94 festiva and the speedo needle fell off. would this mean he needs a new speedo or cluster. i assume they are not screwed in and that something has broken

if he has to change the cluster, are there any helpful hints anyone can give to make it easier. he believes he knows what to do, but there are normally some little surprises that crop up. no doubt experience would be a major asset so any advice would be appreciated

thanx gary