Connecting heat bed

what is the correct way to connect the power expander to the board of the k8400 I have found 2 picture on the web see below


2 Left are both connected to the negative pole, 2 right are both connected to the Positive pole

Kind regards
JeAfKe

So it’s dosent matter witch + or - i put the wire one for the power expander

Exactly both pins will do.

Kind regards
JeAfKe