etek hall sensor replacement

[stonny9]

I am new to the ev world but have been reading for the last few months. Looking to do an ev build on my racing kart frame.

Found an etek for sale but the hall sensors have been removed and the wires are "just hanging there" per the seller. If I can get it for about $150 and the hall sensors are reasonably priced then I will be the first part of my build. But I cant find any info on what hall sensor it needs or how much they cost.