@Lindon You're confusing me again, you have two interface scripts in your snippet both with two slider packs...
This is probably the simplest way - using two global data objects that are assigned to the linked slider packs. However I think it should be possible using setAttribute but currently HISE throws an error saying you have to pass an array, it throws this error even when you do pass an array.
HiseSnippet 1440.3oc6Y00bSaDEUxNKSrA5TnLc5iZxzGLCTOxl3DxvzAm33jFZRjajgzY5CY1Hs1dIx6JVs1foSmxOv9P+IvOAdtuzdWIYKYPXLlvP4C+fGu6du28n6dt28DkVBtCIHfKzzKzdjOQS+RH6QLYuF8vTl1daqo+sn.OpKQ3icNyvixNyPRBjZaMxGGDPb0z0yuqxV8BKoE94E2cKrGl4PRlRS6AbpCYeZepLY1V0+Ypm2NXWRaZ+TVuZ88b3rFbO9..W4QlZp8F2kbHVYVNjl9EZ5RkbgsDCfQSeos3tir6weLKx9GPCnm5QTCpnYCAJZ5c3dtJDqlUqQOpmaqwO+AZZ5nVIYi7QYiqgNf5RmLeRV4qCWvHwiz4C8byBdUdyvyLK3kKE7PQv6JHaGA0WlrhBaEP65wOE6ELEnNbPe6vCxVPxD.EROOjqi7WK2U0QcCcxn6ItXIthwOZzj0kxHkcDD3wXSl6Qjtz.IQjDlsAKKU452o3T9Vc98s50uSmALGIkyL3rC4RhEqz0K96EKT7OJZ7xK0oSlq0fyjBtmGQj4xJxkXVNVhMn+oDwMMFh8FPlXHbtM8w3EluiQf6JILYJC4r8XTokOId7r4gZMhB.7q6umJKAm85wyA14SDRpBN5aSFBEUQLgBnsIAmI49PY0bRStHZOHlhNXnRc1DkboHJ+kNJFKk6iOiri.FLINkVyz7lF0LMAJQQHODHgbpv3k1cE2JrIS4tD4T0WkVIxzj5pJqLcnTXxlHg8SEkwHAhSCdeeNCFTZkT1n7NKmqNGNWMbqSErxBRGhnMOj4FWl.ljxiLr.X3E+3ghiNun3yhVqmKFUv1KCInWMlflv6zn.W7xnTYesPnqniWBBlJ0po+an0Vsbiis723ozsNdU3W26gV2p1uzciV26zaWSMdnU6aUaya7vsN1Zcaq6cZfE7kyFOc+Q6upMXDy51rgMuw1R21qaCt9XqtOZ2l2nbDdeKAY0DPpMMHI.J1nED50TfRXI1sobi8gsulM7EKBTqyFZtpBDbKExhdHn.9Br.mVeiNPPVSA5gVGAgRAxEoCgJ+Gy20zW9s3D3II2Qua8QSF7rCq6iEPzRE1KiRhTUsGSck8lX+y+y58Hzt8RjB7rGTOw78XtjmnRgg4vEBpUSA0m0LETeN48CTyEpmIow6RQ4bPk.2cfGVNszAkdo3EfpzoZ9pZkxBnxQo0S8Vnmvbtk6Luv8JnVToSurwatLvqp.+8LdiUmcYTyNcHNxDvtDZmecQkhsXPY4Wir4KEdMILRU3bNHV1etEKqm+cTbr4Gghi0eU1b1pd9FzqHwXJ3MVmSqDcNAD4OE1DnT0zJaB77SqAA65lzXnzJpUW4lFfbHyIZPf4pNSOpBdTsVrOEUg30n4PYa1hM9hViESqwEPpz8+WEYDhtOBUWflmb9SF+DMZ7OlCw.n4IeE54+7Fh7Wt69y06t+pHnbQjMbMc382wuwK0XiiwCIF6RfKvUI0YcI9ee9eItkiD191BLKvmGLUfsI8osgpffzSd+.3OEm7niTmxomuAGKxboWb2cfGxL8wFKGHBoKa1mOfImhdj+c716LeyaK8APbw4e016dyg7yGbeC5eJLFi1z99djlrgDOnscHFuJzmtCdfmb7rSyqOfy3983LpS5C8iHRAsaWhHM1y7AZSoT0BdxLWq9QDOBNMA96quOP7vBHOQVvbQk4OWLqyquCEAWCUwnwmFM0y+4YS8i3CjTV2Cv.QUcot5cXB8RcH.RXLh2jWiY7XyI5AHL2vA+K7IdwJi0anVrx3E+jYO5icD7SbhDdppWVNbFH2xB++qT.cfZrQhXXjYYSs9PW2SbbTGo+.bFjsOUW.et0B3ypKfO0V.eVaA7Y8EvmaOSeTW3s4.IueT4NLQqlgBy00axvP0RXkk1+gHkQ57