1. I bought a spektrum dx3.0 + sr3000 receiver and they didnt include a instruciton manual... how do I connect them so they will work with each other?

2. (this ones kinda embarassing)... ive been out of RC cars for so long I forgot how the wiring goes!! in the SR3000 receiver, what side does the brown/black cable supposed to face? the inside or outside prongs?

3. on the buggy battery box, there is a on/off switch and three cables coming from it... I understand two are for the battery, but what is the other one for? (mugen mbx5 buggy)