reason i have a non abs master cylinder is due to my car being a conversion, so just got a non abs unit, upgraded it to 1 off a 1.6 though incase its bigger than the 1.3, but defo not an rs turbo abs item

my main confusion here is the fact that i have a non abs cylinder i guess. im currently trying to make use of 4 outlets, whereas the abs cylinder only has 2?

can i still safely make use of the non abs master cylinder, and block off 1 of the rear outlets, and just use the 1 remaining? this is my main issue really