Battery - controller connectors

http://xiongdamotor.en.alibaba.com/product/1557215740-220560510/NEW_Invention_E_bike_Motor_with_CE_CCC_RoHS_Certificates.html

One bike is going to be as plug & play as possible, so I want to buy a 36V 10Ah BMSbattery battery:

http://www.bmsbattery.com/battery-pack/664-36v-12ah-38140-lifepo4-battery-12-cells-ebike-battery-pack.html

and for the second one I want to experiment a bit more, with two 6s 5Ah lipos in series (with the idea to learn, and finally, in a v2.0, add a couple more lipos in parallel, with their main & parallel fuses, a switch & resistor, a wattmeter and a BMS).

Questions:

1. Which is the type of the (male) battery connector of the controller of the Xiongda?
2. Which is the type of the (female) connector of the BMSbattery battery discharge cable? (I assume the battery charge cable is a standard one, fitting to most PSU). There is a picture at the link:
3. Which connector type do you recommend me for the series harness of the lipos? Hobbyking sells EC5, XT90 and HXT4mm. I believe Deans are thought of to be good connectors. Most lipos come with JST-XH for balance wire and HXT4mm for output. Should HXT4mm then be the preferred choice?
4. Would a PC 380W PSU work to charge the lipos with an imax (or eventually with a BMS)? (I recall a "trick" with a clip to be able to use a PC PSU without a motherboard)

I am going to build two e-bikes, both with the Xiongda 2-speed kit:One bike is going to be as plug & play as possible, so I want to buy a 36V 10Ah BMSbattery battery:and for the second one I want to experiment a bit more, with two 6s 5Ah lipos in series (with the idea to learn, and finally, in a v2.0, add a couple more lipos in parallel, with their main & parallel fuses, a switch & resistor, a wattmeter and a BMS).Questions:1. Which is the type of the (male) battery connector of the controller of the Xiongda?2. Which is the type of the (female) connector of the BMSbattery battery discharge cable? (I assume the battery charge cable is a standard one, fitting to most PSU). There is a picture at the link: http://www.bmsbattery.com/battery-pack/664-36v-12ah-38140-lifepo4-battery-12-cells-ebike-battery-pack.html but I do not recognize which connector type is the one at the picture3. Which connector type do you recommend me for the series harness of the lipos? Hobbyking sells EC5, XT90 and HXT4mm. I believe Deans are thought of to be good connectors. Most lipos come with JST-XH for balance wire and HXT4mm for output. Should HXT4mm then be the preferred choice?4. Would a PC 380W PSU work to charge the lipos with an imax (or eventually with a BMS)? (I recall a "trick" with a clip to be able to use a PC PSU without a motherboard)