Johnson Pump Ultima Electronic Float Switch

The wiring for my bilge pump is just nasty, so decided to just rip it all out and start again. My OCD coming out!

It has (or had to be more accurate) an Ultima Electronic Float Switch. Now I've ripped out the wiring I'm struggling to work out the correct wiring scheme.

Can anybody help?

Am I correct that the electronic switch just goes in parallel with the manual switch? i.e. battery positive, paralleled manual switch and electronic float switch, pump positive feed.