Access Target Disk 2nd Macintosh HD How does one connect using Terminal to a mounted Macintosh HD when there are 2 drives with the same name?

$ cd /Volumes
$ ls -l
lrwxr-xr-x   1 root      wheel     1 Jul 27 19:10 Macintosh HD -&gt; /
drwxr-xr-x  35 robertsd  staff  1120 Jul 27 17:09 Macintosh HD 1


I am actually trying to access the 2nd (sick) Macbook's ~/Library via Thunderbolt cable with:

/Volumes/"Macintosh HD"/Users/robertsd/Library/


but this finds the 1st Macintosh HD.
The second hard drive is mounted as "Machintosh HD 1". You should be able to access the User Library data by navigating to it with the command

cd "/Volumes/Macintosh HD 1/Users/robertsd/Library"


(or what username you are trying to access).