the switch is on this website https://blockchair.com/ front page (it shows you the block height) if you are running the BUCash clients you need to check your block high, it should be the same as the website. it may be your are not fully synced and as a result your transaction is not visible. (i think you may meed to mouse over one of the icons in the bottom right of the app to see your block height)I don't see a Bitcoin cash orange switch in the BTU Cash specific client.
it can take a day or 3 to download the entire chain, I don't think you need to worry about loading the BTC chain, it will switch chains at the triggered block height.Is there a way to do this? How do I ensure I just don't reload the regular Bitcoin chain?