If you purchase a Tongsheng TSDZ2 mid-drive electric bike conversion kit direct from China, it is unlikely to come with an installation manual.
Please feel free to download the PDF instruction manual below, detailing how to correctly install your TSDZ2 motor, including a list of all the tools required for the job.
Remember to be patient and leave yourself enough time to do the conversion without rushing. Tidying up the cables can also be time-consuming, but doing it properly will make your finished e-bike look a lot neater.
Tongsheng TSDZ2 installation manual