Mk2 clio heater hose clips

hi guys

hoping you can help. I need to flush the heater core on my mk2 clio (2001, 1.2l, 16v). having looked at the hoses going into the bulkhead they have these strange clips on (see picture) - does anyone know how to take them off? Is it a case of pushing in the button on each side?

I don't...Mk2 clio heater hose clips

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