Hypex NC502 in Ghent Case

[Weeman1973]

I’ve borrowed a Hypex NC502 Amp in a Ghent case and have found a switch on the underside that I have no idea what it’s for?

I guess it’s something about bridge mode but not entirely sure so before connecting up, wanted to check with folk to see if they have any idea. Image is below.

[Weeman1973]

Now sorted thanks.