nema 23 questian

hi guys I got some nema23 I want to use on a laser im building, these have 8 wires, looking to find the best way for the laser, wire series or parallel, using t5 belt 20thooth pulley, these are spare parts off of builds so would like to use these up,

builds im ok with but the electronics is not my strong point, so thought id ask which way is best,

thanks guys kev