Connecting solar panel to PMS3

[furtive]

I've got a PMS3 in my van, and have got a 120W folding solar panel (this one). The solar panel has just been used to charge power banks but I would like to see how I could use it to charge the leisure battery (and maybe the main battery). I would need to buy an MPPT controller, but how would I connect it all up? Can I just connect the panel (via the MPPT controller) to the PMS3 somewhere?

Thanks