Assuming you are using iexpress.exe to bundle your bat and xml files, the exe should extract them to a temporary location (somewhere in %appdata%, local temp most likely), but since you probably wont know what the actual path is, try using %~dp0 in place of the path and that should work.
@echo off
netsh wlan add profile %~dp0Wi-Fi-linksys1.xml
netsh wlan add profile %~dp0Wi-Fi-linksys2.xml
netsh wlan add profile %~dp0Wi-Fi-linksys3.xml
When going through the iexpress process, make sure to check the box to keep the long file names or save the xml files with shorter names like conf1.xml and etc (and reflect the changes in your bat).
update here's where I pulled the %dp0 from if you want to know a little more: https://serverfault.com/a/255294/144813