Optimate Charger Question

Hello there,
I have a home made bike running on two 12V batteries and one "Optimate Battery Optimiser" .
I was wondering if i could use a split charger something like this:

http://images.google.co.uk/imgres?imgurl=https://secure.frooition.com/brocott.co.uk/thumbs2/m102n%2520-%2520Plain.jpg&imgrefurl=...

(i know it's long but you can copy and paste it into the address bar)

it's a "split charge relay charging module" but would my "Optimate 4" be compatible with such a set up?
would it still 'optimise' both batteries?