'My Fitness Pal' shows 9 sweets = 145 cals so that'll be 7 syns. . Don't know how many are in the pack but if you've still got the pack check the NV and divide calories by 20 - that'll give you the number of syns for the whole pack.
The Nestle.co.uk site doesn't show the Orange flavour but the Peppermint has slightly higher calories than the regular milk chocolate ones but I'd use 10 syns for both. (Milk = 192 cals & Peppermint = 195 cals).