Sump setup help.

Hi guys. So I bought a 6 ft tank with a sump setup the other day ( im upgrading from a 4ft fowlr with canister filters) and I'm in the middle of plumbing it all in. It's a 450 dt and 150 sump. The return pump is a jebao dcs9000. I have a tmc600 uv to add to this and I'm wondering which setting I should have the return pump on if the uv is setup inline with it as I don't really want to add another pump etc. Thanks in advance.