Install my new backup generator

I have bought a new Honeywell (Generac) 22kw standby generator from Costco with a 200amp transfer switch. This is to replace a decommissioned 24 year old 20kw generator. The generator is in place but needs the new transfer switch installed and the electrical connections made at the generator. If you are qualified to do this work let's talk about what needs to be done. If necessary can provide photos for a better idea on how to quote the work (hourly or by job).

See online: https://www.costco.com/honeywell-22kw-home-standby-generator-with-transfer-switch.product.100767860.html