Doubt regarding Bus service from Trivandrum city to Attingal?

So Tommorow evening between 4 pm and 6pm , i need to catch a bus to reach Attingal. The thing is I'll either be near PMG main bus stand or near Lulu Mall...so will I be able to catch a bus to Attingal around that time from any of those 2 above mentioned places? Also, where is the bus stand near Lulu, do they have service to Attingal? Please help me out, Thanks :)