What year is it? Don't appear to have them on the rear according to ETKA!
Front ones are just 1 allen head bolt and a 2 pin plug, sure the backs will be the same
1988 would be a mk2 btw. remove allen bolt, usually breaks. pull out sensor. if it won't budge, they usually don't, you can drift them out carefully with a long punch through one of the wheel bolt holes. this WILL knacker the sensor though.