Channel authority by adding a relevant, contextual in-content link from the established ranking page to the new one, using anchor text that describes what the new page is about. That single move passes two things at once: the equity the ranking page has accumulated, and the topical relevance the anchor and surrounding context signal. The link is the mechanism, so the work is to place it well rather than to hope authority diffuses on its own. The procedure is contextual-link-from-the-ranking-page, and the details of how you place it decide how much transfers.
Make the link prominent and genuinely related. A link buried in a footer or a sidebar block carries far less than one set inside the body of the page, where it reads as a real editorial recommendation, so place it within the content of the ranking page at a point where the new page is the natural next step for the reader. The anchor text should be descriptive and relevant to the new page’s topic, because that is what carries the topical signal, and the link only works as authority transfer when the two pages are actually about related things. Forced or off-topic links pass little and can look manipulative.
Support the single link with cluster links so the new page is not standing on one connection alone. Link to it from other related pages on your site, and link out from the new page back into the cluster, so it is woven into the topical structure rather than tacked on. This reinforces the relevance signal and gives the new page multiple paths to discovery and equity, while the link from the strong ranking page remains the primary channel. The ranking page does the heavy lifting; the cluster makes the transfer durable.
So identify your strongest ranking page on the relevant topic, find the natural spot in its body to recommend the new page, and add a prominent contextual link with descriptive anchor text. Then connect the new page into the surrounding cluster. Place the deliberate link from the strong page first, and the authority follows it to where you want it.