The user manual i saw said there should be 0, 1, 2. so for 1 jet solder 0 to 1...but this is the back of my board, only see a 1, 2, 3.
Link to HFS-3 v3.0 manual
http://www.aquamist.co.uk/HFS3/manual/HFS3-v3.0w.pdf
The wiring guide i used said i didn't need to solder, i was so hopeful when i saw your post and the manual, i need to be in map1 but then the back of my board wasn't the same
.
