Yes. You pop the clip on top of the ball sockets up and you can then click the linkage off. They still attach quite firmly even if the clip is broken, so best do this when they are warm to try to minimise the risk of breakage.
If you do break either of the plastic parts then they are still available. They are different and sold individually without the metal threaded rod, which is sold separately.
Right-hand thread (top) 946703
Left-hand thread (bottom) 946704
You adjust the linkage per the attached. It will adjust in situ because of the opposing threads, but you need to undo the lock nuts which are also left- and right-threaded.
You do not use this linkage to adjust idle. However, you do want to ensure that it is properly adjusted before checking idle. The steps to set idle are covered succinctly in this thread on Turbobricks, alas without pictures.
https://turbobricks.com/index.php?th...1/post-2921952
However, before embarking on this bear in mind that none of these settings generally go out unless someone has previously messed with them to try and mask another problem. Erratic or high idle is not going to be due to a sudden conspiracy in these components!