starter interrupt

Hi guys

i have got a starter interrupt with my alarm. Its an independent unit. Once i connected it I found out that my alarm was malfunctioning so I took it off and the alarm works fine. I connected the starter interrupt following the directions given in the alarm manual. They are as follows

According to the diagram

the lead frm 86 should go the cut relay (-) output frm the alarm

join 85 and 30 together and connect to Key ON

87A goes to +12v

I somehow feel its not right and would greatly appreciate any help.

i have checked that. Could it be different depending on different alarms.

if not what are the small X in 87a and 30?

is ignition switch same to KEY ON?

which lead is for starter motor?

try this see if it works

86  armed input from alarm

85 true ignition

87a motor side of starter

30 key side from starter

87 not used

Everything sorted out.

Thanks for your help guys.