OEM ROOF rails fitting help (got from scrap yard - wreckers) how to fit ??

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Hi guys

I have a SX4 2007 Hatchback , just has that black line on the roof with 2 slots each side - i have contacted some local wreckers and got some original roof bars roof rails) - but read some info here now unsure weather they will fit or not
wreckers yard says yes will fit - but i suspect that the car they are removing them from has welded bolts on the roof or not ? - can these rails be fitted easily on a normal SX4 without bolts on the roof - do they go into the slot ? how would one go about fitting -
i did see a post about removing them and install is the reverse but again mentions the bolts and pics not working now .


NO worries guys already found my answer but don't know how to delete post - yes needed spot welded bolts on the roof which i don't have
thanks