The LectraSan is obsolete...the current version is the ElectroScan
Raritan ElectroScan Promo Sheet It creates chlorine by charging the ions in salt water with electrical current. You'll find detailed installation instructions including where to install it in the "Installation, Operation and Maintenance Instructions" (aka "owners manual") which you can download from here
ElectroScan owners manual
However, I recommend you consider going with the PuraSan instead. Unlike the ElectroScan, it doesn't need salt--chlorine is supplied from cartridge--so it works equally well in salt, fresh or brackish water. It's also easier to maintain.
Raritan PuraSan Promo Sheet. All the installation instructions for it are here:
Raritan PuraSan EX owners manual
I'll be glad to answer the questions you're sure to have after you've had a chance to read Raritan's materials.
--Peggie