Problem with Model Target optimization

[ZL_9884170]

As per this thread, similar issue:

Hi，

I used the same method you mentioned, but I have encountered a problem: the model of entire assembly cannot completely coincide with the actual assembly. How can I solve this problem?

(The ratio of the model and the actual object is exactly consistent)

[Suraj_Patil]

will u please elaborate it much by share more pictures with different views?

"which part" is used for model target? what's its color?

from current picture I m not sure what may be issue.