XRAY - Model racing cars

I have just bought LRP SXX TC spec speedo, and the LRP V12 4.5T engine I will use on my T3. It's one cable from the speedo who should be connected to the reciever. Will this cable supply power to the reciever, and also adjust the speed on the engine? I will use 7.2V LIPO, will the speedo send out 6V to the reciever??

Do I need to order some additional conectors/plug's etc for connecting the Lipo battery to the Speedo? I can see it's some cables out of the speedo, 2 wires will go to the battery and 3 to the engine. Can some one make a link to what I need, so I dont order wrong stuff.

Thanks

this is the way the wires go on the motor

red is + on the lipo and black is the -

i use 4mm plugs for the battery but depending on what battery you have bought depends on the connectors for the battery , your local shop should sell them to you

make the wires from the motor to the speedo as short as you can neatly and make them all the same length