External Preamp Insert to MR816 XLR In

Would appreciate some advice. I’m sending a signal out from an insert return (send?) on an external mic pre to Channel 2 in on the MR816. I’m using a TRS to XLR cable. For the purposes of mobile recording I’d rather not have a half pulled TS cable dangling out of the insert hole in the external mic pre, so I’m using the TRS plugged all the way in and connecting to MR816 Channel 2 via XLR. Sounds like I’m getting a good signal but…is this wired ok?