I have 3 Cteks. IIRC each one came with a lead with crocodile clips, and another ‘cigarette’ lighter plug.
All are permanently connect to the cars. I was told to just leave them on ‘frost setting’, no problems so far...


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8