Yes, this is one of the best way to use this combo. Keep one potli in your shop or office cash counter, where money comes in. Keep the second in your home locker, where it is saved.
The kit has the essential samagri for Laxmi-Ganesh Puja at home, so you don’t have to run around the market on Diwali day. Use it on Diwali night for your Laxmi Puja, and place your two potlis during the same puja.
No special rituals are needed. The potlis come already energised by Acharya LavBhushan Ji. Just take a bath, light a diya, say a small prayer to Maa Laxmi and place the potli in your locker or cash counter.