If you FTP to your account and look for the imagemagick utility files that way you should find them. If you installed as per the wiki then your home path would have been prefixed to the folder paths created. So you may find your files skulking under /home/username/bin/ ... or you may not .
The new folders are all created starting from your $home folder so you will find:-
Whether it all works or not is a different matter.
If you use an SSH client with a logging facility it sometimes helps to log your screen output so you can see where 'make install' is plonking your bits!
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Any advice offered by me should be acted upon at your own risk.