If you dont want to solder anything then this and this
But I HIGLY recomend you to change all the conncectors (except motor to esc connectors) for XT90 conncectors and also making a loop key from XT90s and another series adapter…
I would advise you to buy the batteries from HobbyKing. You can get those exact batteries for about $25 (Aud). Apart from that all you will need is some pulleys or sprockets and a motor mount. Good luck